Stillwater · Mixed · US

Lewiston Lake

Lewiston Lake terrain map

Lewiston Lake is the cold heart of the Trinity tailwater system — a long, narrow reservoir fed by water drawn from deep in the dam above, which keeps it cool and trout-rich the whole season through while lakes at the same elevation are warming and going quiet.

Fair · Rainbow
Chubby Chernobyl · 6-10
Fairlive now
Reasonable summer fishing likely at Lewiston Lake
Water temperature is the limiting factor today, not the wave. Fish dawn or dusk if you go at all, and handle everything with extra care.
50% confidence
What moved it
  • WindSE 12 km/hGentle breeze
Today's fly
Chubby Chernobyl
Chubby Chernobyl6-10
High-confidence seasonal pick
Conditions on the water
Live gauge
Wind
Gentle breeze
SE 12 km/h
N
SE
from the south-east
Wave20 cm ripple
Water temp
Air temp33°C
CloudClear
Pressure1013 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Rainbow
When
Conditions are not ideal but fishable at Lewiston Lake. The ripple should help fish move and feed more confidently. Very warm conditions — trout have a narrower safe zone of cool, oxygen-rich water. Fish only at first light or last light, use barbless hooks, keep fish in the water during release, and stop if fish struggle to recover.
Where
Start with Purple Haze (12-18) on a on a floating line. Rainbows respond to more active retrieves — try short strips between pauses. If that does not produce, switch depth or speed before changing the pattern entirely.
The plan
Plan A

Start with Purple Haze (12-18) on a on a floating line. Rainbows respond to more active retrieves — try short strips between pauses. If that does not produce, switch depth or speed before changing the pattern entirely.

Plan B

Fish early and late, try deeper during the heat of the day with a fast-sinking line.

Watch for

Evening tends to be the best period in summer — stay late if you can for a sedge or spinner fall.

Either bank or boat

Good ripple suits both bank and boat. Bank: work inflows, dam walls, and points. Boat: broadside drift covering wind lanes.

Beyond the hatch · worth watchingambient prey

Hatch predictions

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Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Gray DrakeHatch
2
2
CallibaetisHatch
2
3
3
3
2
Hexagenia (Western)Hatch
2
2
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2

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

Ranked for today
Rainbow fly box
What's coming
Plan ahead
5-day outlook
Condition match
41%
Cloud25%
Wind65%
Temp25%

Conditions are away from Lewiston Lake's sweet spot — it usually fishes best in ripple wind with cloud skies.

Other water nearby · 5
About this water

Lewiston Lake is the cold heart of the Trinity tailwater system — a long, narrow reservoir fed by water drawn from deep in the dam above, which keeps it cool and trout-rich the whole season through while lakes at the same elevation are warming and going quiet. That steady cold is the whole story here. It grows rainbows and browns in good condition, and because the temperature never really shuts the fishing down, it's one of the more dependable stillwaters in this part of the state. The constant flow gives it a faint river character at the upper end. Chironomids dominate the diet, and the patient indicator angler does well on them month after month. There are large browns in this water for those who'll fish a streamer through the low light and mean it. Cool, consistent, and quietly generous — a lake worth knowing.

  • Reservoir
  • Mixed
Why this score
  • High temperatures may push fish deeper and reduce surface activity.
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