Freestone · Limestone Influenced · Pennsylvania, US

Yellow Breeches Creek

Yellow Breeches Creek venue image

Half spring creek, half freestone — the Allenberry C&R water at Boiling Springs is a beloved, busy, year-round fishery, and the late-August White Fly hatch (Ephoron leukon) is one of the great spectacles in the East, a dusk blizzard of egg-laying duns that turns the river white and the trout silly.

Today · Slow going — pick your moments
Hopper
Forecast · Today
Slow going — pick your moments
Slow going — pick your moments and do not force it.
80% projected
Today's fly
Hopper
Hopper
Conditions on the water · Today
Live gauge
Level
Rising
0.43 m
Lifting fast
Water temp18.4°C
ClarityVery coloured
Weather26°C
WindN 8 km/h
Pressure1016 hPa
Rain · recent7.9 mm
Rain · ahead7.0 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Rainbow Trout
Warm — slow
18°C est.ideal 10–18°C
0°14°28°
How to fish it · for Rainbow Trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Why this works
Excellent — water temperature is right today, though insect activity could be better.
Likely species
Mayflies
terrestrials
Hatch timeline · todayPeak at 12pm

12pm(now) — Grasshopper (Eastern)

Stage: Terrestrials on topApproach: Dry flyActivity: 71%
Also:Reed Smut29%Trico (Eastern)24%
Peak emergence windowWeather boostDegree-days at peak4 food groups active

Peak activity at 12pm — Grasshopper (Eastern) (Grasshopper (Eastern), Peak emergence window)

Sub-surface · on the nymphunder the surface

Hatch predictions

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 3 with Pro.

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Evidence
Records-basedModerate confidence

Based on species-occurrence records, not local invertebrate surveys.

Through the year
0–3 scale · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
2
2
2
2
2
1
Brown DunHatch
2
3
3
3
3
3
3
2
Quill GordonHatch
2
2
Blue QuillHatch
2
3
2
HendricksonHatch
2
2

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Rainbow Trout fly box
Permits & access
Permit required — see local rules.
  • Allenberry C&R fly-only; stocked-trout regs elsewhere
What's coming
Plan ahead
5-day outlook
Other water nearby · 3
Letort Spring Run
8.0 km
Brown trout
Big Spring Creek
24 km
Brook trout · Brown trout
Falling Spring Branch
50 km
Brown trout · Rainbow trout
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

Half spring creek, half freestone — the Allenberry C&R water at Boiling Springs is a beloved, busy, year-round fishery, and the late-August White Fly hatch (Ephoron leukon) is one of the great spectacles in the East, a dusk blizzard of egg-laying duns that turns the river white and the trout silly. Runs warmer than the pure limestoners, so mind the thermometer in high summer.

  • Limestone influenced
Water quality · US Clean Water Act
  • Aquatic life: Supporting
What this classification means

EPA ATTAINS assessment unit 'Yellow Breeches Creek-56407443' (PA-SCR-56407443), 2024 Integrated Report. Aquatic Life use: Fully Supporting. This is a Clean Water Act assessment-unit classification (the US analogue of WFD), not a live reading.

Status is for the Clean Water Act assessment unit covering this reach.

EPA ATTAINS (Clean Water Act) · PA-SCR-56407443

The full read · show the working · for Rainbow Trout · confidence 90%
How the 84 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time80 × 13%10.4
Pressure75 × 7%5.3
Insect activity64 × 12%7.7
Conditions total= 84
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 January → 31 December
Related guides
Euro Nymphingsubsurface methods
Booking & contacts