Nothing live is published for this water, so there is no reading or verdict today. The readings section below says what we checked.
Martinsdale Reservoir is a lake or reservoir in Montana, listed as Among the state's most-fished waters (agency angler survey) by Montana Fish, Wildlife & Parks.
Martinsdale Reservoir is a lake or reservoir in Montana.
No real-time gauge on this water. We found no active USGS gauge on Martinsdale Reservoir or on its stream system within about 25 miles, and no dam operator publishes data for it. A missing gauge says nothing about the water itself. Find the gauges nearest Martinsdale Reservoir
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.
Restrooms within 2 miles of Martinsdale Reservoir 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.
No restroom mapped within 2 mi yet — add one you know.
Campgrounds, fishing access sites and boat ramps often have one that isn't on the map yet.
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.
Among the state's most-fished waters (agency angler survey)The Boulder River in Sweet Grass County, Montana, in February. Photo: USDA NRCS Montana, public domain, via Wikimedia Commons
Among the state's most-fished waters (agency angler survey)Representative photo · not Shields RiverThe lower Yellowstone River at the Badlands Fishing Access Site near Terry, eastern Montana (far downstream of the Paradise Valley trout water). Photo: Bureau of Land Management Montana-Dakotas, public domain, via Wikimedia Commons Not Shields River.
Montana · about 22 mi
Among the state's most-fished waters (agency angler survey)Representative photo · not Newlan Creek ReservoirEnnis Lake, Montana, in March, with the Madison Range beyond. Photo: Gloria Cabada-Leman, CC BY 2.0, via Flickr Not Newlan Creek Reservoir.
Montana · about 34 mi
Among the state's most-fished waters (agency angler survey)Representative photo · not Warm Springs CreekThe Smith River canyon in early-season snow (US Forest Service work trip, 2010). Photo: USDA Forest Service, Northern Region, public domain, via Wikimedia Commons Not Warm Springs Creek.
Montana · about 34 mi
Among the state's most-fished waters (agency angler survey)Representative photo · not Ackley LakeHenrys Lake from Henrys Lake State Park, Idaho. Photo: James Postema, CC BY 4.0, via Wikimedia Commons Not Ackley Lake.
Montana · about 39 mi
Among the state's most-fished waters (agency angler survey)Representative photo · not Deadmans Basin ReservoirLake Billy Chinook, Oregon. Photo: icetsarina, CC0, via Wikimedia Commons Not Deadmans Basin Reservoir.
Montana · about 41 mi
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.
On the Montana's most-fished waters (FWP statewide angling pressure estimates, 2023 license year, top 250 by state rank) list (Montana Fish, Wildlife & Parks, read 2026-11-05). All waters with this designation
Measured from the NHDPlus High Resolution (flowlines and waterbodies) (U.S. Geological Survey, read 2026-11-05) for this water’s own mapped feature. Rounded figures; they describe the channel, not today’s conditions.
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 shoreline. 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.
3.6 of 9.4 mi of shoreline on public land
Nothing on this page grants or implies access.
From the agency’s own records (Fish Stocking Records (FWP fishViewer), Montana Fish, Wildlife & Parks, read 2026-11-05), listed as Martinsdale Reservoir (agency stocking point). Check the agency for this season.
Past stockings, not a schedule
2026: Rainbow Trout in May (2 stockings, 55,000 fish).
2025: Rainbow Trout in May (2 stockings, 55,000 fish).
2024: Rainbow Trout in May (2 stockings, 56,513 fish).
Listings marked Unclaimed are built from open map records and the business's own website: confirm licensing, rates, dates and hours directly.
No guide within 40 miles yet.
No shop nearby yet.
The hatch and season chart for this water's region.
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)
None of our destination hubs is within 40 miles in a straight line. The trip planner builds a trip around the water itself: the guides and shops listed within 40 miles of it, its gauges and its nearest towns and airports.
No hub within 40 miles
A stillwater fly-fishing checklist for lakes and ponds: a 9–10 ft 5–6 weight rod, floating and intermediate lines, chironomids and leeches, and float-tube options, with estimated prices and where to buy.
9′–10′ rod, 5–6 weight, floating + intermediate lines · Rainbow, brook and brown trout in lakes
Open the checklistChironomids, leeches and where fish hold in a lake.
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 stillwater
Trip stories anglers chose to share publicly and tagged with Martinsdale Reservoir.
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 point for “Martinsdale Reservoir” (reservoir) in the USGS Geographic Names Information System. Water type is our own classification.
Among the state's most-fished waters (agency angler survey)The Boulder River in Sweet Grass County, Montana, in February. Photo: USDA NRCS Montana, public domain, via Wikimedia Commons
Montana · about 45 mi
Rainbow, brown & brook trout
120cfsFlow now · much below normal for the date
Among the state's most-fished waters (agency angler survey)Representative photo · not Shields RiverThe lower Yellowstone River at the Badlands Fishing Access Site near Terry, eastern Montana (far downstream of the Paradise Valley trout water). Photo: Bureau of Land Management Montana-Dakotas, public domain, via Wikimedia Commons Not Shields River.
Among the state's most-fished waters (agency angler survey)Representative photo · not Newlan Creek ReservoirEnnis Lake, Montana, in March, with the Madison Range beyond. Photo: Gloria Cabada-Leman, CC BY 2.0, via Flickr Not Newlan Creek Reservoir.
Montana · about 34 mi
Among the state's most-fished waters (agency angler survey)Representative photo · not Warm Springs CreekThe Smith River canyon in early-season snow (US Forest Service work trip, 2010). Photo: USDA Forest Service, Northern Region, public domain, via Wikimedia Commons Not Warm Springs Creek.
Montana · about 34 mi
Among the state's most-fished waters (agency angler survey)Representative photo · not Ackley LakeHenrys Lake from Henrys Lake State Park, Idaho. Photo: James Postema, CC BY 4.0, via Wikimedia Commons Not Ackley Lake.
Montana · about 39 mi
Among the state's most-fished waters (agency angler survey)Representative photo · not Deadmans Basin ReservoirLake Billy Chinook, Oregon. Photo: icetsarina, CC0, via Wikimedia Commons Not Deadmans Basin Reservoir.
Montana · about 41 mi
