Freestone · Volcanic · Eastern Sierra, US

Rush Creek

Rush Creek venue image

Rush Creek is the Mono Basin's main artery — the biggest of the creeks tumbling off the east Sierra into Mono Lake, looping through the June Lake country and the storied bottomlands below Grant Lake.

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
Estimate
Level
Dry recently
No gauge reading
Water temp9.2°C
ClarityClear
Weather11°C
WindN 13 km/h
Pressure1015 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

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 right today, though time of day could be better.
Likely species
Hatch timeline · tomorrowPeak at 11am

12pm(now) Western Blue-Winged Olive

Stage: On emergersApproach: Emerger or dryActivity: 68%
Also:Black Midge60%
Peak emergence window6 food groups active

Peak activity at 11am — Western Blue-Winged Olive (Western Blue-Winged Olive, Peak emergence window)

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds with Pro.

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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); verify reach rules, dates and any special-regulation bottomland boundaries against current CDFW
  • FLOW: managed by LADWP / Grant Lake Reservoir — read the release, not just the weather.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

Rush Creek is the Mono Basin's main artery — the biggest of the creeks tumbling off the east Sierra into Mono Lake, looping through the June Lake country and the storied bottomlands below Grant Lake. It carries a mix of wild and stocked browns and rainbows, with the upper reaches around the June Lake Loop giving easy, pretty pocket-water fishing and the bottomlands below the reservoir running bigger and wilder, a hard-won restoration success after decades of dewatering. It's freestone in character but managed in fact: Grant Lake Reservoir and LADWP's diversions set the flow, so the creek answers to aqueduct operations as much as to snowmelt, and a big spill year fishes very differently from a tight one. Fish attractors and dry-droppers in the upper loop water, work nymphs and streamers through the bottomland runs, and keep an eye on the release — this is a creek where what's coming out of Grant Lake matters more than what fell from the sky.

  • Volcanic
Water quality · US Clean Water Act
  • Aquatic lifeNot assessed
What this classification means

EPA ATTAINS assessment unit 'Rush Creek (above Grant Lake)' (CAR6010004020171205033763), 2024 Integrated Report. Aquatic Life use: not assessed. 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) · CAR6010004020171205033763

The full read · show the working · for Brown Trout · confidence 75%
How the 71 is built — score × weight = contribution
Temperature82 × 28%23.0
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity52 × 12%6.2
Conditions total= 71
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