Freestone · Mixed · Eastern Sierra, US

Robinson Creek / Twin Lakes (Bridgeport)

Robinson Creek / Twin Lakes (Bridgeport) terrain map

Robinson Creek and the Twin Lakes country above Bridgeport are the classic Eastern Sierra mountain-fishing scene — a freestone creek tumbling out of the Twin Lakes through the Hoover Wilderness gateway, with the lakes themselves famous for the occasional outsized brown that prowls up from deep water.

Tomorrow · A proper day on the water
Sculpin Streamer
Forecast · Tomorrow
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 · Tomorrow
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 1016°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
Hatch timeline · tomorrowPeak 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

Top nymph shown — see all 3 guilds with Pro.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

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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
About this water

Robinson Creek and the Twin Lakes country above Bridgeport are the classic Eastern Sierra mountain-fishing scene — a freestone creek tumbling out of the Twin Lakes through the Hoover Wilderness gateway, with the lakes themselves famous for the occasional outsized brown that prowls up from deep water. The creek fishes as a pretty pocket-water stream of wild and stocked browns and rainbows below the outlet, easy and accessible from the campgrounds, while the lakes are a stillwater story of their own. Being fed off the lakes the creek runs a touch steadier than a pure snowmelt freestone, but it still answers to the runoff: high and pushy in the peak melt, dropping into prime shape through summer. Fish attractors and droppers in the creek's pockets, time it for the drop after runoff, and keep half an eye on Twin Lakes for the trophy brown the area's known for.

  • Mixed
Water quality · US Clean Water Act
  • Aquatic lifeNot assessed
  • RecreationImpaired
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
Temperature73 × 28%20.4
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
Seasons & zones
  • Trout Last Saturday in April15 November
Related guides
Booking & contacts