The Henry's Fork is a tailwater in Idaho, listed as Special-regulation trout water by Idaho Department of Fish and Game.
2 USGS gauges on the water report flow; Idaho Department of Fish and Game lists 6 species, including brown trout, cutthroat trout and brook trout. 2 guides and 3 shops nearby are listed here; the nearest destination hub is Island Park & the Henry's Fork.
The Henry's Fork at Last Chance, Island Park, with the Centennial Mountains. Photo: Z3lvs, CC0, via Wikimedia Commons
Henry's Fork is a tailwater in Idaho. Our destination hub Island Park & the Henry's Fork is 1 mi away in a straight line and lists it among its waters.
Pick one of its USGS gauges and hear from us when the flow moves into or out of its usual range for the date, or crosses a flow you set. We check the public USGS reading every 2 hours and email only when it crosses, at most once every 6 hours. Flow alone is not a fishing forecast or a safety call.
Signed in: one step. Otherwise we email a confirmation link first. Every alert has one-click links to stop it.
Start from the agency's public access map. Nothing on this page grants or implies access: check the agency map, posted signs and landowner permission before you fish.
Nothing on this page grants or implies access.
Gauges, shops and guides within 40 miles
Map of Henry's Fork: gauges, shops and guides
Map of Henry's Fork with 2 USGS gauges.
Restrooms within 2 miles of Henry's Fork in a straight line, nearest first, with what anglers found when they went. The map says a restroom is there, not whether it is clean or open today.
Map of 6 restrooms near Henry's Fork
Skip the map; every place is in the list belowMap of 6 restrooms near Henry's Fork, numbered as in the list, with the water’s point marked.
Not rated yet — be the first to tell other anglers if it's clean.
Mapped on OpenStreetMap · see or fix it on the map
Not rated yet — be the first to tell other anglers if it's clean.
Mapped on OpenStreetMap · see or fix it on the map
Not rated yet — be the first to tell other anglers if it's clean.
Mapped on OpenStreetMap · see or fix it on the map
Not rated yet — be the first to tell other anglers if it's clean.
Mapped on OpenStreetMap · see or fix it on the map
At a campground · Aud & Di Campground Services
Not rated yet — be the first to tell other anglers if it's clean.
Mapped on OpenStreetMap · see or fix it on the map
At a campground · Aud & Di Campground Services
Not rated yet — be the first to tell other anglers if it's clean.
Mapped on OpenStreetMap · see or fix it on the map
Restroom locations and map details: © OpenStreetMap contributors, Open Database License, read Oct 24, 2026. Ratings, answers and photos are members' own; who shared them is never shown, and every photo is reviewed before it appears. Visits older than 18 months no longer count. Distances are straight-line miles, not driving. Nothing here grants access to private land. Community guidelines.
Featured sport-fishing waterHenrys Lake from Henrys Lake State Park, Idaho. Photo: James Postema, CC BY 4.0, via Wikimedia Commons
Featured sport-fishing waterRepresentative photo · not Island Park ReservoirEnnis Lake, Montana, in March, with the Madison Range beyond. Photo: Gloria Cabada-Leman, CC BY 2.0, via Flickr Not Island Park Reservoir.
Featured sport-fishing waterRepresentative photo · not Warm RiverThe Fall River in autumn, Idaho. Photo: Tony Webster, CC BY 2.0, via Wikimedia Commons Not Warm River.
Featured sport-fishing waterRepresentative photo · not Blue Creek ReservoirLake Billy Chinook, Oregon. Photo: icetsarina, CC0, via Wikimedia Commons Not Blue Creek Reservoir.
Featured sport-fishing waterRepresentative photo · not Sand Creek ReservoirEagle Lake, Lassen County, California, with dry Horse Lake in the foreground (aerial). Photo: Ken Lund from Reno, Nevada, USA, CC BY-SA 2.0, via Wikimedia Commons Not Sand Creek Reservoir.
Featured sport-fishing waterRepresentative photo · not Ashton ReservoirNavajo Lake from Navajo Lake State Park, New Mexico. Photo: Larry D. Moore, CC BY 4.0, via Wikimedia Commons Not Ashton Reservoir.
Seasons, limits, special regulations and closures for each reach are on the agency pages below. Read them before you go.
Each comes from the agency's own published list; where the list names a reach it is quoted. A designation applies to the listed reach, not necessarily the whole water. Listed in the finder under trout.
On the Special Rule Waters (trout / salmon / gear rules) list (Idaho Department of Fish and Game, read 2026-11-05). All waters with this designation
Quoted word for word from the agency page on the date shown. Many quotes name the reach they cover and apply only to that part of the water. Rules change; the linked page is the authority.
“Henrys Fork (Snake River, North Fork) From the lower Harriman State Park boundary upstream to the upper Harriman State Park boundary (Harriman Ranch) June 15 through November 30 – trout – catch-and-release, fly fishing only, barbless hooks required”
Idaho Department of Fish and Game · read 2026-10-14
“Henrys Fork (Snake River, North Fork) From Henrys Lake Outlet upstream to the head of Big Springs Closed to fishing”
Idaho Department of Fish and Game · read 2026-10-14
Measured from the NHDPlus High Resolution (flowlines and waterbodies) (U.S. Geological Survey, read 2026-11-04) for this water’s own mapped feature. Rounded figures; they describe the channel, not today’s conditions.
USGS name: Henrys Fork
Areas the Protected Areas Database of the United States (PAD-US), public access (U.S. Geological Survey, Gap Analysis Project, read 2026-11-05) lists as owned or held in easement and open to the public, crossed by the mapped channel. Boundaries are mapped, not surveyed. Nothing on this page grants or implies access: check the agency map, posted signs and landowner permission before you fish.
32.4 of 79.7 mi on public land
Nothing on this page grants or implies access.
Listings marked Unclaimed are built from open map records and the business's own website: confirm licensing, rates, dates and hours directly.
2 guides name it on their website
Victor, ID · 58 mi
Float trips · Wade trips · Bighorn & Snake
Names this water
The species the agency lists here; presence varies by reach and season.
Listed by the state agency
Species guide
Rainbow trout (Oncorhynchus mykiss), illustration by Duane Raver for the U.S. Fish and Wildlife Service. Photo: Duane Raver, U.S. Fish and Wildlife Service, public domain, via Wikimedia Commons
Species guide
Brown trout (Salmo trutta), U.S. Fish and Wildlife Service illustration. Photo: U.S. Fish and Wildlife Service, public domain, via Wikimedia Commons
Species guide
Brook trout (Salvelinus fontinalis), illustration by Duane Raver for the U.S. Fish and Wildlife Service. Photo: Duane Raver, U.S. Fish and Wildlife Service, public domain, via Wikimedia Commons
Species guide
Cutthroat trout (Oncorhynchus clarkii), photographed by James E. Johnson for the U.S. Fish and Wildlife Service. Photo: James E. Johnson, U.S. Fish and Wildlife Service, public domain, via Wikimedia Commons
5 hatches charted for the region, not measured on this water. From Montana Fish, Wildlife & Parks.
Mother's Day caddis (Grannom) (May) · Salmonfly (May to June) · Salmonfly (May to July) · Salmonfly (July) · Trico (August to September)
Island Park lies on the Henry's Fork of the Snake River in eastern Idaho, between Henry's Lake and Ashton, about 20 miles south-west of West Yellowstone and the park's west entrance.
Destination hub · 1 mi away in a straight line
Matched on the fish the agencies list for both waters first, then the same water type, an official designation or flagship listing on both, and a similar mapped size where USGS hydrography covers both.
At most two waters per country. A shared fish is a listing, not a promise: presence varies by reach and season.
Like the Henry's Fork? Same fish, overseas.
Flagship waterThe Meander River in Deloraine, Tasmania. Photo: Gary Houston, CC0, via Wikimedia Commons
TailwaterThe Grand River just north of Paris, Ontario, looking upstream. Photo: JustSomePics, CC BY-SA 3.0, via Wikimedia Commons
Flagship waterThe Tekapo–Pukaki hydro canal, Mackenzie Country, Canterbury. Photo: Avenue, CC BY-SA 3.0, via Wikimedia Commons
TailwaterThe lower Clutha River / Mata-Au and Inch Clutha from Kaitangata. Photo: Andrewrutherford, CC BY-SA 4.0, via Wikimedia Commons
TailwaterRepresentative photo · not Río CalcurrupeThe Río Toltén at Pocoyán. Photo: Maxbalter, CC BY-SA 3.0, via Wikimedia Commons Not Río Calcurrupe.
TailwaterRepresentative photo · not Brumbys CreekThe South Esk River, Tasmania. Photo: Michael Coghlan from Adelaide, Australia, CC BY-SA 2.0, via Wikimedia Commons Not Brumbys Creek.
Southern seasons open while ours close.
Flagship waterPenstock Lagoon, Central Highlands, Tasmania. Photo: Mike Cline, CC BY-SA 4.0, via Wikimedia Commons
Freestone riverRepresentative photo · not Río PetrohuéThe Río Puelo at Las Gualas, Cochamó. Photo: Nicolás from seno de reloncaví, Chile, CC BY-SA 2.0, via Wikimedia Commons Not Río Petrohué.
Lake or reservoirRepresentative photo · not Lago LlanquihueThe Río Simpson passing Coyhaique, Aysén. Photo: Manxuc, CC BY-SA 4.0, via Wikimedia Commons Not Lago Llanquihue.
Lake or reservoir
Flagship waterRepresentative photo · not Mataura RiverThe Oreti River near Lumsden, Southland. Photo: Krzysztof Golik, CC BY-SA 4.0, cropped, via Wikimedia Commons Not Mataura River.
Flagship waterGreat Lake, Tasmania. Photo: Peripitus, CC BY-SA 3.0, via Wikimedia Commons
A wade-fishing checklist for big western trout rivers: a 9 ft 5–6 weight outfit, nymph, dry and streamer setups, waders, boots and a wading staff, with estimated prices by tier and where to buy.
9′ rod, 5–6 weight, floating line · Rainbow and brown trout, whitefish
Open the checklistSeams, shelves and soft water, shown on real rivers.
Public YouTube videos from established channels, chosen by us to support this page. Not sponsored; the creators are not affiliated with Legendary Fly Gear.
Not sponsored All videos on reading water
Indicator rigs, depth and detecting the take.
Public YouTube videos from established channels, chosen by us to support this page. Not sponsored; the creators are not affiliated with Legendary Fly Gear.
Not sponsored All videos on nymphing
Trip stories anglers chose to share publicly and tagged with Henry's Fork.
No stories from here yet.
Not a statement of access, fish presence or conditions.
A water page organises discovery. It does not assert public access, legal access, current fish presence, guide availability or fishing conditions.
Flows, gauge statistics and flood stages come from USGS and the National Weather Service when the page is shown. Regulations, stocking, species and season statements link to the agency that publishes them; this page copies only the species names and the quoted sentences. Guide and shop listings come from the Legendary directories. Position: the USGS gauge HENRYS FORK NR ISLAND PARK ID. Water type is our own classification.
Limited data: Normal flow for the date: no water temperature here
No water temperature here.
At HENRYS FORK NR ISLAND PARK ID (USGS 13042500) · 1 of 2 gauges below Provisional USGS data
USGS 13042500 · NWS ISLI1
What the agencies suggest
Carry a pocket thermometer to monitor water temperatureNational Park Service
General guidance from the readings and the published lines named above, not a fishing forecast. Local rules and closures come first.
Reading Nov 5, 3:45 PM MST · provisional USGS data
Below normal for Nov 5 Steady · 24 h
Discharge, last 7 days: 169 readings from Oct 29, 5:15 PM MDT to Nov 5, 3:45 PM MST; ranging 82.6 to 86 ft³/s; latest 84.3 ft³/s.
USGS provisional data may be revised. Source: USGS Water Data API continuous values.
| Time | Discharge (ft³/s) | Gauge height (ft) |
|---|---|---|
| Nov 5, 3:45 PM MST | 84.3 | 2.09 |
| Nov 5, 2:45 PM MST | 84.3 | 2.09 |
| Nov 5, 1:45 PM MST | 84.3 | 2.09 |
| Nov 5, 12:45 PM MST | 84.3 | 2.09 |
| Nov 5, 11:45 AM MST | 86 | 2.1 |
| Nov 5, 10:45 AM MST | 84.3 | 2.09 |
| Nov 5, 9:45 AM MST | 84.3 | 2.09 |
| Nov 5, 8:45 AM MST | 84.3 | 2.09 |
| Nov 5, 7:45 AM MST | 84.3 | 2.09 |
| Nov 5, 6:45 AM MST | 84.3 | 2.09 |
| Nov 5, 5:45 AM MST | 84.3 | 2.09 |
| Nov 5, 4:45 AM MST | 84.3 | 2.09 |
| Nov 5, 3:45 AM MST | 84.3 | 2.09 |
| Nov 5, 2:45 AM MST | 84.3 | 2.09 |
| Nov 5, 1:45 AM MST | 84.3 | 2.09 |
| Nov 5, 12:45 AM MST | 84.3 | 2.09 |
| Nov 4, 11:45 PM MST | 84.3 | 2.09 |
| Nov 4, 10:45 PM MST | 86 | 2.1 |
| Nov 4, 9:45 PM MST | 84.3 | 2.09 |
| Nov 4, 8:45 PM MST | 86 | 2.1 |
| Nov 4, 7:45 PM MST | 84.3 | 2.09 |
| Nov 4, 6:45 PM MST | 84.3 | 2.09 |
| Nov 4, 5:45 PM MST | 84.3 | 2.09 |
| Nov 4, 4:45 PM MST | 84.3 | 2.09 |
| Nov 4, 3:45 PM MST | 84.3 | 2.09 |
| Nov 4, 2:45 PM MST | 84.3 | 2.09 |
| Nov 4, 1:45 PM MST | 82.6 | 2.08 |
| Nov 4, 12:45 PM MST | 84.3 | 2.09 |
| Nov 4, 11:45 AM MST | 84.3 | 2.09 |
| Nov 4, 10:45 AM MST | 84.3 | 2.09 |
| Nov 4, 9:45 AM MST | 84.3 | 2.09 |
| Nov 4, 8:45 AM MST | 84.3 | 2.09 |
| Nov 4, 7:45 AM MST | 84.3 | 2.09 |
| Nov 4, 6:45 AM MST | 84.3 | 2.09 |
| Nov 4, 5:45 AM MST | 84.3 | 2.09 |
| Nov 4, 4:45 AM MST | 84.3 | 2.09 |
| Nov 4, 3:45 AM MST | 84.3 | 2.09 |
| Nov 4, 2:45 AM MST | 84.3 | 2.09 |
| Nov 4, 1:45 AM MST | 84.3 | 2.09 |
| Nov 4, 12:45 AM MST | 82.6 | 2.08 |
| Nov 3, 11:45 PM MST | 82.6 | 2.08 |
| Nov 3, 10:45 PM MST | 84.3 | 2.09 |
| Nov 3, 9:45 PM MST | 82.6 | 2.08 |
| Nov 3, 8:45 PM MST | 84.3 | 2.09 |
| Nov 3, 7:45 PM MST | 84.3 | 2.09 |
| Nov 3, 6:45 PM MST | 86 | 2.1 |
| Nov 3, 5:45 PM MST | 84.3 | 2.09 |
| Nov 3, 4:45 PM MST | 84.3 | 2.09 |
| Nov 3, 3:45 PM MST | 84.3 | 2.09 |
| Nov 3, 2:45 PM MST | 84.3 | 2.09 |
| Nov 3, 1:45 PM MST | 84.3 | 2.09 |
| Nov 3, 12:45 PM MST | 84.3 | 2.09 |
| Nov 3, 11:45 AM MST | 84.3 | 2.09 |
| Nov 3, 10:45 AM MST | 84.3 | 2.09 |
| Nov 3, 9:45 AM MST | 84.3 | 2.09 |
| Nov 3, 8:45 AM MST | 84.3 | 2.09 |
| Nov 3, 7:45 AM MST | 84.3 | 2.09 |
| Nov 3, 6:45 AM MST | 84.3 | 2.09 |
| Nov 3, 5:45 AM MST | 84.3 | 2.09 |
| Nov 3, 4:45 AM MST | 84.3 | 2.09 |
| Nov 3, 3:45 AM MST | 84.3 | 2.09 |
| Nov 3, 2:45 AM MST | 84.3 | 2.09 |
| Nov 3, 1:45 AM MST | 84.3 | 2.09 |
| Nov 3, 12:45 AM MST | 84.3 | 2.09 |
| Nov 2, 11:45 PM MST | 84.3 | 2.09 |
| Nov 2, 10:45 PM MST | 84.3 | 2.09 |
| Nov 2, 9:45 PM MST | 82.6 | 2.08 |
| Nov 2, 8:45 PM MST | 84.3 | 2.09 |
| Nov 2, 7:45 PM MST | 84.3 | 2.09 |
| Nov 2, 6:45 PM MST | 86 | 2.1 |
| Nov 2, 5:45 PM MST | 86 | 2.1 |
| Nov 2, 4:45 PM MST | 84.3 | 2.09 |
| Nov 2, 3:45 PM MST | 84.3 | 2.09 |
| Nov 2, 2:45 PM MST | 86 | 2.1 |
| Nov 2, 1:45 PM MST | 84.3 | 2.09 |
| Nov 2, 12:45 PM MST | 84.3 | 2.09 |
| Nov 2, 11:45 AM MST | 86 | 2.1 |
| Nov 2, 10:45 AM MST | 84.3 | 2.09 |
| Nov 2, 9:45 AM MST | 84.3 | 2.09 |
| Nov 2, 8:45 AM MST | 86 | 2.1 |
| Nov 2, 7:45 AM MST | 86 | 2.1 |
| Nov 2, 6:45 AM MST | 84.3 | 2.09 |
| Nov 2, 5:45 AM MST | 84.3 | 2.09 |
| Nov 2, 4:45 AM MST | 84.3 | 2.09 |
| Nov 2, 3:45 AM MST | 84.3 | 2.09 |
| Nov 2, 2:45 AM MST | 84.3 | 2.09 |
| Nov 2, 1:45 AM MST | 84.3 | 2.09 |
| Nov 2, 12:45 AM MST | 84.3 | 2.09 |
| Nov 1, 11:45 PM MST | 84.3 | 2.09 |
| Nov 1, 10:45 PM MST | 84.3 | 2.09 |
| Nov 1, 9:45 PM MST | 84.3 | 2.09 |
| Nov 1, 8:45 PM MST | 84.3 | 2.09 |
| Nov 1, 7:45 PM MST | 84.3 | 2.09 |
| Nov 1, 6:45 PM MST | 86 | 2.1 |
| Nov 1, 5:45 PM MST | 86 | 2.1 |
| Nov 1, 4:45 PM MST | 84.3 | 2.09 |
| Nov 1, 3:45 PM MST | 84.3 | 2.09 |
| Nov 1, 2:45 PM MST | 84.3 | 2.09 |
| Nov 1, 1:45 PM MST | 84.3 | 2.09 |
| Nov 1, 12:45 PM MST | 84.3 | 2.09 |
| Nov 1, 11:45 AM MST | 84.3 | 2.09 |
| Nov 1, 10:45 AM MST | 84.3 | 2.09 |
| Nov 1, 9:45 AM MST | 84.3 | 2.09 |
| Nov 1, 8:45 AM MST | 84.3 | 2.09 |
| Nov 1, 7:45 AM MST | 84.3 | 2.09 |
| Nov 1, 6:45 AM MST | 84.3 | 2.09 |
| Nov 1, 5:45 AM MST | 84.3 | 2.09 |
| Nov 1, 4:45 AM MST | 84.3 | 2.09 |
| Nov 1, 3:45 AM MST | 84.3 | 2.09 |
| Nov 1, 2:45 AM MST | 84.3 | 2.09 |
| Nov 1, 1:45 AM MST | 84.3 | 2.09 |
| Nov 1, 1:45 AM MDT | 84.3 | 2.09 |
| Nov 1, 12:45 AM MDT | 84.3 | 2.09 |
| Oct 31, 11:45 PM MDT | 84.3 | 2.09 |
| Oct 31, 10:45 PM MDT | 84.3 | 2.09 |
| Oct 31, 9:45 PM MDT | 84.3 | 2.09 |
| Oct 31, 8:45 PM MDT | 84.3 | 2.09 |
| Oct 31, 7:45 PM MDT | 84.3 | 2.09 |
| Oct 31, 6:45 PM MDT | 84.3 | 2.09 |
| Oct 31, 5:45 PM MDT | 84.3 | 2.09 |
| Oct 31, 4:45 PM MDT | 84.3 | 2.09 |
| Oct 31, 3:45 PM MDT | 84.3 | 2.09 |
| Oct 31, 2:45 PM MDT | 84.3 | 2.09 |
| Oct 31, 1:45 PM MDT | 84.3 | 2.09 |
| Oct 31, 12:45 PM MDT | 84.3 | 2.09 |
| Oct 31, 11:45 AM MDT | 84.3 | 2.09 |
| Oct 31, 10:45 AM MDT | 84.3 | 2.09 |
| Oct 31, 9:45 AM MDT | 84.3 | 2.09 |
| Oct 31, 8:45 AM MDT | 84.3 | 2.09 |
| Oct 31, 7:45 AM MDT | 84.3 | 2.09 |
| Oct 31, 6:45 AM MDT | 84.3 | 2.09 |
| Oct 31, 5:45 AM MDT | 84.3 | 2.09 |
| Oct 31, 4:45 AM MDT | 84.3 | 2.09 |
| Oct 31, 3:45 AM MDT | 84.3 | 2.09 |
| Oct 31, 2:45 AM MDT | 84.3 | 2.09 |
| Oct 31, 1:45 AM MDT | 84.3 | 2.09 |
| Oct 31, 12:45 AM MDT | 82.6 | 2.08 |
| Oct 30, 11:45 PM MDT | 82.6 | 2.08 |
| Oct 30, 10:45 PM MDT | 84.3 | 2.09 |
| Oct 30, 9:45 PM MDT | 84.3 | 2.09 |
| Oct 30, 8:45 PM MDT | 84.3 | 2.09 |
| Oct 30, 7:45 PM MDT | 84.3 | 2.09 |
| Oct 30, 6:45 PM MDT | 84.3 | 2.09 |
| Oct 30, 5:45 PM MDT | 84.3 | 2.09 |
| Oct 30, 4:45 PM MDT | 84.3 | 2.09 |
| Oct 30, 3:45 PM MDT | 84.3 | 2.09 |
| Oct 30, 2:45 PM MDT | 84.3 | 2.09 |
| Oct 30, 1:45 PM MDT | 84.3 | 2.09 |
| Oct 30, 12:45 PM MDT | 84.3 | 2.09 |
| Oct 30, 11:45 AM MDT | 84.3 | 2.09 |
| Oct 30, 10:45 AM MDT | 84.3 | 2.09 |
| Oct 30, 9:45 AM MDT | 84.3 | 2.09 |
| Oct 30, 8:45 AM MDT | 84.3 | 2.09 |
| Oct 30, 7:45 AM MDT | 84.3 | 2.09 |
| Oct 30, 6:45 AM MDT | 84.3 | 2.09 |
| Oct 30, 5:45 AM MDT | 84.3 | 2.09 |
| Oct 30, 4:45 AM MDT | 84.3 | 2.09 |
| Oct 30, 3:45 AM MDT | 84.3 | 2.09 |
| Oct 30, 2:45 AM MDT | 84.3 | 2.09 |
| Oct 30, 1:45 AM MDT | 84.3 | 2.09 |
| Oct 30, 12:45 AM MDT | 84.3 | 2.09 |
| Oct 29, 11:45 PM MDT | 84.3 | 2.09 |
| Oct 29, 10:45 PM MDT | 84.3 | 2.09 |
| Oct 29, 9:45 PM MDT | 84.3 | 2.09 |
| Oct 29, 8:45 PM MDT | 84.3 | 2.09 |
| Oct 29, 7:45 PM MDT | 84.3 | 2.09 |
| Oct 29, 6:45 PM MDT | 86 | 2.1 |
| Oct 29, 5:45 PM MDT | 84.3 | 2.09 |
| Oct 29, 5:15 PM MDT | 86 | 2.1 |
Normal for Nov 5: 172–521 ft³/s (middle half of 93 years of record). Now: 84.3 ft³/s, below normal.
Below normal for this date. 84.3 ft³/s is between the 10th and 25th percentiles of daily mean flow for Nov 5 at this gauge over 93 years of record: 10th 72.2, 25th 172, median 340, 75th 521, 90th 605 ft³/s.
Daily means on record for Nov 5: lowest 1.4 ft³/s, highest 1,660 ft³/s.
Classes as USGS labels them (hyswap: flow categories (WDFN_stats schema) (U.S. Geological Survey) ); percentiles from the USGS daily statistics (U.S. Geological Survey) (approved daily means; the reading is provisional and instantaneous).
Steady over 24 hours (+0% discharge). Rising or falling means a change of more than 10% in discharge (or 0.2 ft of gauge height) over 24 hours; our rule of thumb, not a USGS class.
NWS observed 2.09 ft stage, 84 ft³/s at Nov 5, 2:45 PM MST (NWS gauge ISLI1; its stage datum can differ from the USGS gauge height).
NWS has not set flood categories for this gauge.
NWS river forecast forecast issued Nov 5, 8:13 AM MST. Highest point: 2.09 ft, 84 ft³/s on Nov 5, 11:00 AM MST.
| Day | Stage | Flow |
|---|---|---|
| Thu, Nov 5 | 2.09 ft | 84 ft³/s |
| Fri, Nov 6 | 2.09 ft | 84 ft³/s |
| Sat, Nov 7 | 2.09 ft | 84 ft³/s |
| Sun, Nov 8 | 2.09 ft | 84 ft³/s |
| Mon, Nov 9 | 2.09 ft | 84 ft³/s |
| Tue, Nov 10 | 2.09 ft | 84 ft³/s |
| Wed, Nov 11 | 2.09 ft | 84 ft³/s |
| Thu, Nov 12 | 2.09 ft | 84 ft³/s |
| Fri, Nov 13 | 2.09 ft | 84 ft³/s |
| Sat, Nov 14 | 2.09 ft | 84 ft³/s |
Open the NWS gauge page · What the categories mean (National Weather Service)
No current water-temperature reading at this gauge, so no temperature guidance is given. Take a stream thermometer: the trout lines Idaho Fish and Game uses are 66°F and 73°F.
Species the agency lists for Henry's Fork: Brown Trout, Cutthroat Trout, Brook Trout, Mountain Whitefish, Rainbow Trout, Cutbow - Cutthroat x Rainbow Trout.
Source: Henrys Fork Snake River (Henrys Fork, North Fork Snake River) | Idaho Fishing Planner (Idaho Department of Fish and Game).
Turn Around Don't Drown. “A mere 6 inches of fast-moving flood water can knock over an adult.” No flow number makes a crossing safe; if in doubt, stay out.
Turn Around Don't Drown (National Weather Service)Guidance from the readings above and the published thresholds named with each line; not a fishing forecast, a safety guarantee or a statement about access. Local rules and closures come first.
USGS 13046000 · NWS HFAI1
What the agencies suggest
Approach the stream carefully and with a low profileIowa Department of Natural Resources
Fishing upstream will usually spook fewer fish than working downstreamIowa Department of Natural Resources
Deep pools and undercut banks provide refuge during sunny days and low waterMinnesota Department of Natural Resources
General guidance from the readings and the published lines named above, not a fishing forecast. Local rules and closures come first.
Reading Nov 5, 3:15 PM MST · provisional USGS data
Much below normal for Nov 5 Steady · 24 h
Discharge, last 7 days: 168 readings from Oct 29, 5:15 PM MDT to Nov 5, 3:15 PM MST; ranging 602 to 859 ft³/s; latest 609 ft³/s.
USGS provisional data may be revised. Source: USGS Water Data API continuous values.
| Time | Discharge (ft³/s) | Gauge height (ft) |
|---|---|---|
| Nov 5, 3:15 PM MST | 609 | 2.72 |
| Nov 5, 2:15 PM MST | 609 | 2.72 |
| Nov 5, 1:15 PM MST | 609 | 2.72 |
| Nov 5, 12:15 PM MST | 609 | 2.72 |
| Nov 5, 11:15 AM MST | 609 | 2.72 |
| Nov 5, 10:15 AM MST | 609 | 2.72 |
| Nov 5, 9:15 AM MST | 609 | 2.72 |
| Nov 5, 8:15 AM MST | 609 | 2.72 |
| Nov 5, 7:15 AM MST | 609 | 2.72 |
| Nov 5, 6:15 AM MST | 609 | 2.72 |
| Nov 5, 5:15 AM MST | 609 | 2.72 |
| Nov 5, 4:15 AM MST | 602 | 2.71 |
| Nov 5, 3:15 AM MST | 609 | 2.72 |
| Nov 5, 2:15 AM MST | 609 | 2.72 |
| Nov 5, 1:15 AM MST | 602 | 2.71 |
| Nov 5, 12:15 AM MST | 609 | 2.72 |
| Nov 4, 11:15 PM MST | 609 | 2.72 |
| Nov 4, 10:15 PM MST | 609 | 2.72 |
| Nov 4, 9:15 PM MST | 609 | 2.72 |
| Nov 4, 8:15 PM MST | 609 | 2.72 |
| Nov 4, 7:15 PM MST | 609 | 2.72 |
| Nov 4, 6:15 PM MST | 609 | 2.72 |
| Nov 4, 5:15 PM MST | 609 | 2.72 |
| Nov 4, 4:15 PM MST | 609 | 2.72 |
| Nov 4, 3:15 PM MST | 609 | 2.72 |
| Nov 4, 2:15 PM MST | 615 | 2.73 |
| Nov 4, 1:15 PM MST | 609 | 2.72 |
| Nov 4, 12:15 PM MST | 609 | 2.72 |
| Nov 4, 11:15 AM MST | 609 | 2.72 |
| Nov 4, 10:15 AM MST | 609 | 2.72 |
| Nov 4, 9:15 AM MST | 609 | 2.72 |
| Nov 4, 8:15 AM MST | 615 | 2.73 |
| Nov 4, 7:15 AM MST | 622 | 2.74 |
| Nov 4, 6:15 AM MST | 615 | 2.73 |
| Nov 4, 5:15 AM MST | 615 | 2.73 |
| Nov 4, 4:15 AM MST | 615 | 2.73 |
| Nov 4, 3:15 AM MST | 615 | 2.73 |
| Nov 4, 2:15 AM MST | 615 | 2.73 |
| Nov 4, 1:15 AM MST | 615 | 2.73 |
| Nov 4, 12:15 AM MST | 615 | 2.73 |
| Nov 3, 11:15 PM MST | 615 | 2.73 |
| Nov 3, 10:15 PM MST | 615 | 2.73 |
| Nov 3, 9:15 PM MST | 615 | 2.73 |
| Nov 3, 8:15 PM MST | 615 | 2.73 |
| Nov 3, 7:15 PM MST | 615 | 2.73 |
| Nov 3, 6:15 PM MST | 615 | 2.73 |
| Nov 3, 5:15 PM MST | 622 | 2.74 |
| Nov 3, 4:15 PM MST | 615 | 2.73 |
| Nov 3, 3:15 PM MST | 615 | 2.73 |
| Nov 3, 2:15 PM MST | 622 | 2.74 |
| Nov 3, 1:15 PM MST | 622 | 2.74 |
| Nov 3, 12:15 PM MST | 615 | 2.73 |
| Nov 3, 11:15 AM MST | 622 | 2.74 |
| Nov 3, 10:15 AM MST | 615 | 2.73 |
| Nov 3, 9:15 AM MST | 622 | 2.74 |
| Nov 3, 8:15 AM MST | 622 | 2.74 |
| Nov 3, 7:15 AM MST | 680 | 2.82 |
| Nov 3, 6:15 AM MST | 687 | 2.83 |
| Nov 3, 5:15 AM MST | 687 | 2.83 |
| Nov 3, 4:15 AM MST | 687 | 2.83 |
| Nov 3, 3:15 AM MST | 687 | 2.83 |
| Nov 3, 2:15 AM MST | 687 | 2.83 |
| Nov 3, 1:15 AM MST | 687 | 2.83 |
| Nov 3, 12:15 AM MST | 687 | 2.83 |
| Nov 2, 11:15 PM MST | 680 | 2.82 |
| Nov 2, 10:15 PM MST | 680 | 2.82 |
| Nov 2, 9:15 PM MST | 687 | 2.83 |
| Nov 2, 8:15 PM MST | 694 | 2.84 |
| Nov 2, 7:15 PM MST | 687 | 2.83 |
| Nov 2, 6:15 PM MST | 687 | 2.83 |
| Nov 2, 5:15 PM MST | 694 | 2.84 |
| Nov 2, 4:15 PM MST | 687 | 2.83 |
| Nov 2, 3:15 PM MST | 725 | 2.88 |
| Nov 2, 2:15 PM MST | 725 | 2.88 |
| Nov 2, 1:15 PM MST | 717 | 2.87 |
| Nov 2, 12:15 PM MST | 717 | 2.87 |
| Nov 2, 11:15 AM MST | 748 | 2.91 |
| Nov 2, 10:15 AM MST | 756 | 2.92 |
| Nov 2, 9:15 AM MST | 795 | 2.97 |
| Nov 2, 8:15 AM MST | 795 | 2.97 |
| Nov 2, 7:15 AM MST | 795 | 2.97 |
| Nov 2, 6:15 AM MST | 804 | 2.98 |
| Nov 2, 5:15 AM MST | 804 | 2.98 |
| Nov 2, 4:15 AM MST | 804 | 2.98 |
| Nov 2, 3:15 AM MST | 804 | 2.98 |
| Nov 2, 2:15 AM MST | 795 | 2.97 |
| Nov 2, 1:15 AM MST | 795 | 2.97 |
| Nov 2, 12:15 AM MST | 804 | 2.98 |
| Nov 1, 11:15 PM MST | 804 | 2.98 |
| Nov 1, 10:15 PM MST | 804 | 2.98 |
| Nov 1, 9:15 PM MST | 836 | 3.02 |
| Nov 1, 8:15 PM MST | 859 | 3.05 |
| Nov 1, 7:15 PM MST | 859 | 3.05 |
| Nov 1, 6:15 PM MST | 828 | 3.01 |
| Nov 1, 5:15 PM MST | 828 | 3.01 |
| Nov 1, 4:15 PM MST | 694 | 2.84 |
| Nov 1, 3:15 PM MST | 694 | 2.84 |
| Nov 1, 2:15 PM MST | 694 | 2.84 |
| Nov 1, 1:15 PM MST | 687 | 2.83 |
| Nov 1, 12:15 PM MST | 687 | 2.83 |
| Nov 1, 11:15 AM MST | 687 | 2.83 |
| Nov 1, 10:15 AM MST | 687 | 2.83 |
| Nov 1, 9:15 AM MST | 687 | 2.83 |
| Nov 1, 8:15 AM MST | 687 | 2.83 |
| Nov 1, 7:15 AM MST | 629 | 2.75 |
| Nov 1, 6:15 AM MST | 622 | 2.74 |
| Nov 1, 5:15 AM MST | 622 | 2.74 |
| Nov 1, 4:15 AM MST | 622 | 2.74 |
| Nov 1, 3:15 AM MST | 622 | 2.74 |
| Nov 1, 2:15 AM MST | 622 | 2.74 |
| Nov 1, 1:15 AM MST | 622 | 2.74 |
| Nov 1, 1:15 AM MDT | 622 | 2.74 |
| Nov 1, 12:15 AM MDT | 622 | 2.74 |
| Oct 31, 11:15 PM MDT | 622 | 2.74 |
| Oct 31, 10:15 PM MDT | 622 | 2.74 |
| Oct 31, 9:15 PM MDT | 622 | 2.74 |
| Oct 31, 8:15 PM MDT | 622 | 2.74 |
| Oct 31, 7:15 PM MDT | 622 | 2.74 |
| Oct 31, 6:15 PM MDT | 622 | 2.74 |
| Oct 31, 5:15 PM MDT | 622 | 2.74 |
| Oct 31, 4:15 PM MDT | 622 | 2.74 |
| Oct 31, 3:15 PM MDT | 622 | 2.74 |
| Oct 31, 2:15 PM MDT | 629 | 2.75 |
| Oct 31, 1:15 PM MDT | 622 | 2.74 |
| Oct 31, 12:15 PM MDT | 622 | 2.74 |
| Oct 31, 11:15 AM MDT | 622 | 2.74 |
| Oct 31, 10:15 AM MDT | 622 | 2.74 |
| Oct 31, 9:15 AM MDT | 615 | 2.73 |
| Oct 31, 8:15 AM MDT | 622 | 2.74 |
| Oct 31, 7:15 AM MDT | 622 | 2.74 |
| Oct 31, 6:15 AM MDT | 622 | 2.74 |
| Oct 31, 5:15 AM MDT | 615 | 2.73 |
| Oct 31, 4:15 AM MDT | 622 | 2.74 |
| Oct 31, 3:15 AM MDT | 622 | 2.74 |
| Oct 31, 2:15 AM MDT | 615 | 2.73 |
| Oct 31, 1:15 AM MDT | 622 | 2.74 |
| Oct 31, 12:15 AM MDT | 615 | 2.73 |
| Oct 30, 11:15 PM MDT | 622 | 2.74 |
| Oct 30, 10:15 PM MDT | 622 | 2.74 |
| Oct 30, 9:15 PM MDT | 622 | 2.74 |
| Oct 30, 8:15 PM MDT | 622 | 2.74 |
| Oct 30, 7:15 PM MDT | 622 | 2.74 |
| Oct 30, 6:15 PM MDT | 622 | 2.74 |
| Oct 30, 5:15 PM MDT | 622 | 2.74 |
| Oct 30, 4:15 PM MDT | 615 | 2.73 |
| Oct 30, 3:15 PM MDT | 622 | 2.74 |
| Oct 30, 2:15 PM MDT | 622 | 2.74 |
| Oct 30, 1:15 PM MDT | 622 | 2.74 |
| Oct 30, 12:15 PM MDT | 622 | 2.74 |
| Oct 30, 11:15 AM MDT | 622 | 2.74 |
| Oct 30, 10:15 AM MDT | 622 | 2.74 |
| Oct 30, 9:15 AM MDT | 622 | 2.74 |
| Oct 30, 8:15 AM MDT | 622 | 2.74 |
| Oct 30, 7:15 AM MDT | 622 | 2.74 |
| Oct 30, 6:15 AM MDT | 622 | 2.74 |
| Oct 30, 5:15 AM MDT | 622 | 2.74 |
| Oct 30, 4:15 AM MDT | 622 | 2.74 |
| Oct 30, 3:15 AM MDT | 622 | 2.74 |
| Oct 30, 2:15 AM MDT | 622 | 2.74 |
| Oct 30, 1:15 AM MDT | 622 | 2.74 |
| Oct 30, 12:15 AM MDT | 622 | 2.74 |
| Oct 29, 11:15 PM MDT | 622 | 2.74 |
| Oct 29, 10:15 PM MDT | 622 | 2.74 |
| Oct 29, 9:15 PM MDT | 622 | 2.74 |
| Oct 29, 8:15 PM MDT | 622 | 2.74 |
| Oct 29, 7:15 PM MDT | 622 | 2.74 |
| Oct 29, 6:15 PM MDT | 622 | 2.74 |
| Oct 29, 5:15 PM MDT | 622 | 2.74 |
Normal for Nov 5: 950–1,310 ft³/s (middle half of 110 years of record). Now: 609 ft³/s, much below normal.
Much below normal for this date. 609 ft³/s is below the 10th percentile of daily mean flow for Nov 5 at this gauge over 110 years of record: 10th 791, 25th 950, median 1,110, 75th 1,310, 90th 1,495 ft³/s.
Daily means on record for Nov 5: lowest 570 ft³/s, highest 2,610 ft³/s.
Classes as USGS labels them (hyswap: flow categories (WDFN_stats schema) (U.S. Geological Survey) ); percentiles from the USGS daily statistics (U.S. Geological Survey) (approved daily means; the reading is provisional and instantaneous).
Steady over 24 hours (+0% discharge). Rising or falling means a change of more than 10% in discharge (or 0.2 ft of gauge height) over 24 hours; our rule of thumb, not a USGS class.
NWS observed 2.72 ft stage, 609 ft³/s at Nov 5, 3:15 PM MST (NWS gauge HFAI1; its stage datum can differ from the USGS gauge height).
NWS has not set flood categories for this gauge.
Forecasts are not available. Only observed stages are available for this point.
Open the NWS gauge page · What the categories mean (National Weather Service)
No current water-temperature reading at this gauge, so no temperature guidance is given. Take a stream thermometer: the trout lines Idaho Fish and Game uses are 66°F and 73°F.
Species the agency lists for Henry's Fork: Brown Trout, Cutthroat Trout, Brook Trout, Mountain Whitefish, Rainbow Trout, Cutbow - Cutthroat x Rainbow Trout.
Source: Henrys Fork Snake River (Henrys Fork, North Fork Snake River) | Idaho Fishing Planner (Idaho Department of Fish and Game).
Turn Around Don't Drown. “A mere 6 inches of fast-moving flood water can knock over an adult.” No flow number makes a crossing safe; if in doubt, stay out.
Turn Around Don't Drown (National Weather Service)Guidance from the readings above and the published thresholds named with each line; not a fishing forecast, a safety guarantee or a statement about access. Local rules and closures come first.
Checked Nov 5, 4:08 PM MST; readings refresh at most every 15 minutes and statistics daily. Provisional USGS data can be revised. Conditions change: re-check before you go. This is general guidance, not a fishing forecast, a safety guarantee or a statement about access.
Featured sport-fishing waterHenrys Lake from Henrys Lake State Park, Idaho. Photo: James Postema, CC BY 4.0, via Wikimedia Commons
Featured sport-fishing waterRepresentative photo · not Island Park ReservoirEnnis Lake, Montana, in March, with the Madison Range beyond. Photo: Gloria Cabada-Leman, CC BY 2.0, via Flickr Not Island Park Reservoir.
Featured sport-fishing waterRepresentative photo · not Warm RiverThe Fall River in autumn, Idaho. Photo: Tony Webster, CC BY 2.0, via Wikimedia Commons Not Warm River.
Featured sport-fishing waterRepresentative photo · not Blue Creek ReservoirLake Billy Chinook, Oregon. Photo: icetsarina, CC0, via Wikimedia Commons Not Blue Creek Reservoir.
Featured sport-fishing waterRepresentative photo · not Sand Creek ReservoirEagle Lake, Lassen County, California, with dry Horse Lake in the foreground (aerial). Photo: Ken Lund from Reno, Nevada, USA, CC BY-SA 2.0, via Wikimedia Commons Not Sand Creek Reservoir.
Featured sport-fishing waterRepresentative photo · not Ashton ReservoirNavajo Lake from Navajo Lake State Park, New Mexico. Photo: Larry D. Moore, CC BY 4.0, via Wikimedia Commons Not Ashton Reservoir.
Island Park, Idaho
Fishing lodge · 1.2 mi
Island Park, Idaho
River cabins · 3.0 mi
Island Park, Idaho
Guest ranch · 3.0 mi
Island Park, Idaho
Fishing lodge · 3.3 mi
Island Park, Idaho
River cabins · 3.5 mi
Island Park, Idaho
Fishing lodge · 3.8 mi
Island Park, Idaho
Fishing lodge · 8.0 mi
Island Park, Idaho
Fishing lodge · 9.4 mi
