Freestone · Mixed · Eastern Sierra, US

Robinson Creek / Twin Lakes (Bridgeport)

Robinson Creek / Twin Lakes (Bridgeport) terrain map
Today · A proper day on the water
Sculpin Streamer
Forecast · Today
A proper day on the water
A proper day for it. Work the seams with an upstream nymph, switch to the dry when they show.
75% projected
Today's fly
Sculpin Streamer
Sculpin Streamer
Conditions on the water · Today
Live gauge
Level
Steady
0.51 m
Water temp9.1°C
ClarityClear
Weather11°C
WindN 15 km/h
Pressure1016 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

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

Water temperature for Brown Trout
Cool — slow
9°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown 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
Good — water clarity is working for you, but time of day is the limiting factor today.
Likely species
Mayflies
Caddisflies
terrestrials
Hatch timeline · todayPeak at 12pm

12pm(now) — Mahogany Dun

Stage: On emergersApproach: Emerger or dryActivity: 60%
Also:Black Midge53%
Peak emergence windowDegree-days at peak5 food groups active

Peak activity at 12pm — Mahogany Dun (Mahogany Dun, Peak emergence window)

Sub-surface · on the nymphunder the surface

Hatch predictions

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Beyond the hatch · worth watchingambient prey(1)

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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
1
Brown DunHatch
2
3
3
3
3
3
3
2
Western Green DrakeHatch
2
2
Flav (Small Western Green Drake)Hatch
2
3
2
Mahogany DunHatch
2
2

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

Ranked for today
Brown Trout fly box
SD
Sex Dungeon
2-6 · Pattern
Proven pattern for this period
Permits & access
Permit required — see local rules.
  • General-season trout water (~late April–mid-November); creek and Twin Lakes rules/openers may differ — verify against current CDFW
  • TEMPERATURE: no live USGS water temp at 10290500 — temperature is estimated, not measured.
What's coming
Plan ahead
5-day outlook
Other water nearby · 4
East Walker River
18 km
Brown trout · Rainbow trout
Bridgeport Reservoir
18 km
Brown trout · Rainbow trout
West Walker River
29 km
Rainbow trout · Brown trout
Rush Creek
48 km
Brown trout · Rainbow trout
Water quality · US Clean Water Act
  • Aquatic life: Not assessed
  • Recreation: Impaired
What this classification means

Recreation: Bacteria/pathogen advisory — mind wading cuts and immersion.

EPA ATTAINS assessment unit 'Robinson Creek (Twin Lakes to Hwy 395)' (CAR6303005020020117085757), 2024 Integrated Report. Aquatic Life use: not assessed. Listed impairment causes: Pathogens. 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) · CAR6303005020020117085757

The full read · show the working · for Brown Trout · confidence 75%
How the 73 is built — score × weight = contribution
Temperature72 × 28%20.2
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity59 × 12%7.1
Conditions total= 73
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout Last Saturday in April → 15 November
Related guides
Euro Nymphingsubsurface methods
Booking & contacts