Catskills and the Northeast
Pennsylvania hatches and shad and herring runs from the Fish & Boat Commission, and the New York (including the Beaver Kill) and Vermont trout seasons. Each row is charted only for the months its source gives; where a source names an insect but gives no months, it is not charted. Conditions vary by water and year: use this to plan, then ask a local shop.
- 17sourced rows
- 7sources
- 3states
Month by month
- Hatch
- Fish run
- Season or closure
| Event, where, source | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Blue QuillHatch · Pennsylvania trout streams (statewide)[1] Pennsylvania Fish & Boat Commission | January: no | February: no | March: no | April: yes | May: no | June: no | July: no | August: no | September: no | October: no | November: no | December: no |
| HendricksonHatch · Pennsylvania trout streams (statewide)[1] Pennsylvania Fish & Boat Commission | January: no | February: no | March: no | April: yes | May: no | June: no | July: no | August: no | September: no | October: no | November: no | December: no |
| Quill GordonHatch · Pennsylvania trout streams (statewide)[1] Pennsylvania Fish & Boat Commission | January: no | February: no | March: no | April: yes | May: no | June: no | July: no | August: no | September: no | October: no | November: no | December: no |
| Green drakeHatch · Pennsylvania (statewide nature calendar)[2] Pennsylvania Fish & Boat Commission | January: no | February: no | March: no | April: no | May: yes | June: no | July: no | August: no | September: no | October: no | November: no | December: no |
| Mayflies (best hatches)Hatch · Pennsylvania trout streams (statewide; PFBC Coldwater Unit Leader)[1] Pennsylvania Fish & Boat Commission | January: no | February: no | March: no | April: no | May: yes | June: no | July: no | August: no | September: no | October: no | November: no | December: no |
| Mayflies, stoneflies and caddisfliesHatch · Upper Delaware River, Pike County, Pennsylvania[3] Pennsylvania Fish & Boat Commission | January: no | February: no | March: no | April: no | May: no | June: yes | July: yes | August: yes | September: yes | October: no | November: no | December: no |
| Cinnamon caddisHatch · Oil Creek, Oil Creek State Park, Venango County, Pennsylvania[4] Pennsylvania Fish & Boat Commission | January: no | February: no | March: no | April: no | May: no | June: no | July: no | August: no | September: yes | October: no | November: no | December: no |
| Slate drake (Isonychia)Hatch · Pennsylvania trout streams (statewide)[1] Pennsylvania Fish & Boat Commission | January: no | February: no | March: no | April: no | May: no | June: no | July: no | August: no | September: no | October: yes | November: no | December: no |
| American shad runFish run · Delaware River, Wayne County, Pennsylvania[3] Pennsylvania Fish & Boat Commission | January: no | February: no | March: no | April: yes | May: yes | June: yes | July: no | August: no | September: no | October: no | November: no | December: no |
| American shad runFish run · Delaware River, Monroe County (to the Delaware Water Gap), Pennsylvania[3] Pennsylvania Fish & Boat Commission | January: no | February: no | March: no | April: yes | May: yes | June: yes | July: no | August: no | September: no | October: no | November: no | December: no |
| River herring runFish run · Tidal Delaware River, Delaware County, Pennsylvania[3] Pennsylvania Fish & Boat Commission | January: no | February: no | March: no | April: yes | May: yes | June: no | July: no | August: no | September: no | October: no | November: no | December: no |
| Extended trout season (stocked trout waters)Season or closure · Pennsylvania stocked trout waters (2026)[5] Pennsylvania Fish & Boat Commission | January: yes | February: yes | March: no | April: no | May: no | June: no | July: no | August: no | September: yes | October: yes | November: yes | December: yes |
| Open season for troutSeason or closure · Vermont streams and rivers[6] Vermont Fish & Wildlife Department | January: no | February: no | March: no | April: yes | May: yes | June: yes | July: yes | August: yes | September: yes | October: yes | November: no | December: no |
| Regular trout season (statewide opener to Sept. 7)Season or closure · Pennsylvania Commonwealth inland waters (2026)[5] Pennsylvania Fish & Boat Commission | January: no | February: no | March: no | April: yes | May: yes | June: yes | July: yes | August: yes | September: yes | October: no | November: no | December: no |
| Trout harvest season (Wild and Stocked streams)Season or closure · New York inland trout streams (statewide category)[7] New York State DEC | January: no | February: no | March: no | April: yes | May: yes | June: yes | July: yes | August: yes | September: yes | October: yes | November: no | December: no |
| Thermal-refuge angling closureSeason or closure · Beaver Kill, Iron Bridge at Horton downstream to the first Route 17 overpass, New York[7] New York State DEC | January: no | February: no | March: no | April: no | May: no | June: no | July: yes | August: yes | September: no | October: no | November: no | December: no |
| Catch-and-release season (Wild and Stocked streams)Season or closure · New York inland trout streams (statewide category)[7] New York State DEC | January: yes | February: yes | March: yes | April: no | May: no | June: no | July: no | August: no | September: no | October: yes | November: yes | December: yes |
- Blue Quill AprilHatch · Pennsylvania trout streams (statewide) · [1] Pennsylvania Fish & Boat Commission
- Hendrickson AprilHatch · Pennsylvania trout streams (statewide) · [1] Pennsylvania Fish & Boat Commission
- Quill Gordon AprilHatch · Pennsylvania trout streams (statewide) · [1] Pennsylvania Fish & Boat Commission
- Green drake MayHatch · Pennsylvania (statewide nature calendar) · [2] Pennsylvania Fish & Boat Commission
- Mayflies (best hatches) MayHatch · Pennsylvania trout streams (statewide; PFBC Coldwater Unit Leader) · [1] Pennsylvania Fish & Boat Commission
- Mayflies, stoneflies and caddisflies June to SeptemberHatch · Upper Delaware River, Pike County, Pennsylvania · [3] Pennsylvania Fish & Boat Commission
- Cinnamon caddis SeptemberHatch · Oil Creek, Oil Creek State Park, Venango County, Pennsylvania · [4] Pennsylvania Fish & Boat Commission
- Slate drake (Isonychia) OctoberHatch · Pennsylvania trout streams (statewide) · [1] Pennsylvania Fish & Boat Commission
- American shad run April to JuneFish run · Delaware River, Wayne County, Pennsylvania · [3] Pennsylvania Fish & Boat Commission
- American shad run April to JuneFish run · Delaware River, Monroe County (to the Delaware Water Gap), Pennsylvania · [3] Pennsylvania Fish & Boat Commission
- River herring run April to MayFish run · Tidal Delaware River, Delaware County, Pennsylvania · [3] Pennsylvania Fish & Boat Commission
- Extended trout season (stocked trout waters) September to FebruarySeason or closure · Pennsylvania stocked trout waters (2026) · [5] Pennsylvania Fish & Boat Commission
- Open season for trout April to OctoberSeason or closure · Vermont streams and rivers · [6] Vermont Fish & Wildlife Department
- Regular trout season (statewide opener to Sept. 7) April to SeptemberSeason or closure · Pennsylvania Commonwealth inland waters (2026) · [5] Pennsylvania Fish & Boat Commission
- Trout harvest season (Wild and Stocked streams) April to OctoberSeason or closure · New York inland trout streams (statewide category) · [7] New York State DEC
- Thermal-refuge angling closure July to AugustSeason or closure · Beaver Kill, Iron Bridge at Horton downstream to the first Route 17 overpass, New York · [7] New York State DEC
- Catch-and-release season (Wild and Stocked streams) October to MarchSeason or closure · New York inland trout streams (statewide category) · [7] New York State DEC
What each source says
The source's own words behind every row, so you can see exactly where the months come from.
- Blue Quill, Pennsylvania trout streams (statewide) (April):
Some years, you can begin the season with a hatch like the Quill Gordon, Blue Quill, or Hendrickson in April and end the season in October with a Slate Drake or Blue Dun.
[1] - Hendrickson, Pennsylvania trout streams (statewide) (April):
Some years, you can begin the season with a hatch like the Quill Gordon, Blue Quill, or Hendrickson in April and end the season in October with a Slate Drake or Blue Dun.
[1] - Quill Gordon, Pennsylvania trout streams (statewide) (April):
Some years, you can begin the season with a hatch like the Quill Gordon, Blue Quill, or Hendrickson in April and end the season in October with a Slate Drake or Blue Dun.
[1] - Green drake, Pennsylvania (statewide nature calendar) (May):
EASTERN GREEN DRAKE Ephemera guttulata Begins hatching near the end of May.
[2] - Mayflies (best hatches), Pennsylvania trout streams (statewide; PFBC Coldwater Unit Leader) (May):
"Some of our best mayfly hatches occur in May, and with water temperatures warming up, you have fish more actively feeding," said Nate Walters, Pennsylvania Fish and Boat Commission Coldwater Unit Leader.
[1] - Mayflies, stoneflies and caddisflies, Upper Delaware River, Pike County, Pennsylvania (June to September):
Anglers can find good trout fishing at the mouths of tributary trout streams. Excellent hatches of mayflies, stoneflies and caddises come off in June and into early September.
[3] - Cinnamon caddis, Oil Creek, Oil Creek State Park, Venango County, Pennsylvania (September):
Each September, a hatch of cinnamon caddisflies rises on Oil Creek, which fly anglers strive to imitate with a pattern tied on a size 12 fly hook.
[4] - Slate drake (Isonychia), Pennsylvania trout streams (statewide) (October):
Some years, you can begin the season with a hatch like the Quill Gordon, Blue Quill, or Hendrickson in April and end the season in October with a Slate Drake or Blue Dun.
[1] - American shad run, Delaware River, Wayne County, Pennsylvania (April to June):
Shad fishing begins about the end of April and continues well into June.
[3] - American shad run, Delaware River, Monroe County (to the Delaware Water Gap), Pennsylvania (April to June):
American shad are in the area from early April until early June.
[3] - River herring run, Tidal Delaware River, Delaware County, Pennsylvania (April to May):
Herring pass through in late April and May when anglers score while jigging with bare gold hooks.
[3] - Extended trout season (stocked trout waters), Pennsylvania stocked trout waters (2026) (September to February):
Extended Season: Stocked trout waters Jan. 1 through Feb. 15 and Sept. 8 through Dec. 31
[5] - Open season for trout, Vermont streams and rivers (April to October):
Even if you're not fishing during the open season for trout (2nd Sat. in April – Oct. 31), most stream and rivers are still open year-round.
[6] - Regular trout season (statewide opener to Sept. 7), Pennsylvania Commonwealth inland waters (2026) (April to September):
Statewide Opening Day of Trout Season April 4 at 8 a.m. through Sept. 7
[5] - Trout harvest season (Wild and Stocked streams), New York inland trout streams (statewide category) (April to October):
April 1 - October 15, Daily Limit - 5 with only 2 longer than 12"
[7] - Thermal-refuge angling closure, Beaver Kill, Iron Bridge at Horton downstream to the first Route 17 overpass, New York (July to August):
Angling prohibited from July 1 through August 31 to protect thermally stressed trout.
[7] - Catch-and-release season (Wild and Stocked streams), New York inland trout streams (statewide category) (October to March):
October 16 - March 31, Catch and Release only, Artificial lures only
[7]
Use it on the water
Pick flies with the fly finder, check an insect with the fly identifier, and read the flow and temperature on each water page before you go.
- New York watersWater pages
- Pennsylvania watersWater pages
- Vermont watersWater pages
Sources
Every fact on this page is our paraphrase of the page cited beside it, read on the date shown. Rules and seasons change: check the agency's current regulations before you fish.
- Pennsylvania Angler & Boater, March/April 2026 (incl. 'Season's First Sip -- Strategies for Early Spring Hatches', C. A. Shane) Pennsylvania Fish & Boat Commission, read Oct 24, 2026.
- Pennsylvania Angler & Boater, May/June 2026 Pennsylvania Fish & Boat Commission, read Oct 24, 2026.
- The Delaware River in Pennsylvania (Pennsylvania Angler & Boater reprint, PDF) Pennsylvania Fish & Boat Commission, read Oct 24, 2026.
- Pennsylvania Angler & Boater, September/October 2025 (Oil Creek State Park article) Pennsylvania Fish & Boat Commission, read Oct 24, 2026.
- Pennsylvania Angler & Boater, November/December 2025 (2026 Seasons, Sizes and Daily Limits) Pennsylvania Fish & Boat Commission, read Oct 24, 2026.
- Year-Round Trout Fishing Vermont Fish & Wildlife Department, read Oct 24, 2026.
- Inland Trout Stream Special Regulations New York State DEC, read Oct 24, 2026.
Other regions
- Northern Rockies8 rows
- Pacific Northwest10 rows
- California19 rows
- Southwest and Colorado8 rows
- Alaska8 rows
- Driftless19 rows
- Southern Appalachians27 rows
- Ozarks3 rows
- Great Lakes10 rows