Brokenstraw Creek
The valley creek: stocked and wild-brown trout water up top that melts into smallmouth water at the Allegheny.
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Current conditions
Gauge: USGS 03015500 — Brokenstraw Creek at Youngsville, PA
Reading baked into this page when it was last updated at 2026-10-14 21:00 — checking the live USGS feed now…
| Window | Reading |
|---|---|
| Too low | Under 150 cfs |
| Low and fishable | 150 - 280 cfs |
| Prime | 280 - 800 cfs |
| High - edges only | 800 - 1,550 cfs |
| Blown out | Over 1,550 cfs |
Valley freestone: tea-green when right. The farm-country tributaries muddy the lower creek first - the top stays fishable a day longer.
2-3 days flood to prime after major events; moderate rises clear in about a day.
How the bands were set: Working bands derived from USGS daily discharge statistics for station 03015500, 10 years ending Oct 2026: percentiles p10 92, p25 164, median 379, p75 769, p90 1,540, p95 2,260 cfs.
Gauge page: USGS monitoring location 03015500
Season playbook
Resolved from today's date — the current season is highlighted. On the live site this re-resolves in your browser.
Spring (Mar - May)
The water: Full valley water; the hatch sequence runs April into June.
Fish present: Stocked trout, wild browns; walleye at the mouth early.
How to fish it: Nymph by day, dry at dusk; mouth at dawn for walleye in March.
Summer (Jun - Aug)
The water: Upper valley stays coolest; lower creek turns to bass.
Fish present: Trout up, smallmouth down.
How to fish it: Dawn trout up-valley; bass below Youngsville by day.
Fall (Sep - Nov)This season
The water: Low, clear, and pretty; browns on the move.
Fish present: Browns, holdover rainbows.
How to fish it: Streamers on the drops; October caddis evenings.
Winter (Dec - Feb)
The water: Cold valley; town pools are the fishery.
Fish present: Holdover trout.
How to fish it: Midges midday.
On now — hatch & forage for October
- Blue-Winged Olive — BWO dun, Pheasant Tail
- Slate Drake — Isonychia nymph
- Crayfish (lower creek smallmouth) — Crayfish patterns
- October Caddis — Orange sedge
Full calendar
| Item | Window | Size | Patterns | Notes |
|---|---|---|---|---|
| Little Black Stonefly | Feb - Mar | #14-18 | Black Stonefly nymph | First hatch in the valley riffles. |
| Blue-Winged Olive | Mar - Apr and Sep - Nov | #16-20 | BWO dun, Pheasant Tail | Grey days, spring and fall. |
| Grannom caddis | Mid-Apr - early May | #14-16 | Grannom pupa and dry | Valley-wide caddis event. |
| Hendrickson | Mid-Apr - mid May | #12-14 | Hendrickson dun | Afternoon pools in the mid-valley. |
| Sulphur | Mid-May - mid Jun | #16-18 and #12-14 | Sulphur dun and spinner | The evening hatch above Youngsville. |
| Green Drake (larger pools) | Late May - mid Jun | #8-12 | Green Drake dun, Coffin Fly | Typical window per PA regional hatch charts; a lower-valley big-pool event, brief. |
| Slate Drake | Jun and Sep - Oct | #10-14 | Isonychia nymph | Swum to the banks. |
| Terrestrials | Jul - Sep | #10-18 | Ants, beetles, hoppers | Meadow banks in the upper valley. |
| Crayfish (lower creek smallmouth) | May - Oct | #4-8 | Crayfish patterns | Below Youngsville. |
| October Caddis | Sep - Oct | #10-12 | Orange sedge | Fall dusk. |
Weather & conditions playbook
The row matching the live flow band is highlighted when the gauge answers.
| Condition | What changes | Tactics | Flies | Verdict |
|---|---|---|---|---|
| High and off-color (over 1,550) | The valley runs brown bank to bank for days. | Wait; the upper valley returns first. | First-drop streamers. | Stay home 2-3 days. |
| Prime green (280 - 800) | Full but clear-green: every reach fishes. | Match the hatch hour; browns in the mid-valley. | Season's patterns. | Go. |
| Low and clear (under 150) | Skinny valley water; fish in the pools and shade. | Dawn and dusk; fine tippets. | BWO, midges, terrestrials in season. | Technical. |
| Cold snap | Slow, clear, midday-only. | Town pools, midges. | Zebra midges. | Short sessions. |
| Warm rain | The brown-trout trigger on the drop. | Streamers in the colored edges. | Buggers, sculpins. | Go on the drop. |
| Summer heat (over 68 F) | Lower creek is bass water anyway; upper trout stress in heat waves. | Fish bass below town; leave upper trout at midday. | Crayfish and poppers. | Switch species, not just spots. |
Access points
Youngsville - the gauge town · Map pin
Parking: Borough parking and bridge crossings in Youngsville; the creek threads the town.
The working center of the creek: stocked water in and around town, food and fuel, and the gauge's own reach. Fish up-creek for wild browns, down for smallmouth.
Irvine - the mouth at the Allegheny · Map pin
Parking: Village of Irvine at the creek mouth; river access nearby.
Where the creek meets the Allegheny: spring walleye water, summer smallmouth, and the valley's biggest pools.
Upper valley crossings (Spring Creek / Columbus corridor) · Map pin
Parking: Bridge crossings on the upper valley roads; farm country - park off pavement and respect lanes.
The wild-brown water: smaller, colder, and quieter above Youngsville. Much of the bank is farmland - ask where it is posted, and leave gates as found.
Access changes with postings and seasons — respect every sign, and confirm current PFBC regulations before fishing.
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The complete guide: access map with GPS pins, the full flow-band tactics, hatch calendar, weather playbook, regulations, and sources — a living guide, refreshed as conditions and data change, with refreshed editions free to buyers.
Not sure yet? Preview a full guide free: San Juan River sample (PDF) — a complete guide, so you can see exactly what you get.