Reservoir · Mixed · Northern California

Lake Almanor

Misty morning at Lake Almanor with a fishing boat at the dock and Mount Lassen rising in the background, Plumas County, California

Big reservoir up in the Lassen country, and the whole calendar bends around one thing: the early-summer Hexagenia hatch.

Fair · Rainbow
Callibaetis Nymph · 12-16
Fairlive now
Reasonable summer fishing likely at Lake Almanor
Glassy and bright — hard work without a breeze. Hard work without breeze. Look for the dimples.
51% confidence
What moved it
  • WindNW 4 km/hCalm
Today's fly
CN
Callibaetis Nymph12-16
High-confidence seasonal pick
Conditions on the water
Live gauge
Wind
Calm
NW 4 km/h
N
NW
from the north-west
WaveFlat calm
Water temp
Air temp17°C
CloudBroken
Pressure1018 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Rainbow
When
Current conditions suit Lake Almanor well for summer tactics. Flat calm means fish may be spookier — longer leaders and subtler flies will help.
Where
Start with Callibaetis Nymph (12-16) on a slow figure-of-eight retrieve. 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 Callibaetis Nymph (12-16) on a slow figure-of-eight retrieve. 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.

Bank

Flat calm suits bank fishing near features — points, weed beds, and inflows where fish patrol.

Sub-surface · on the nymphunder the surface

Hatch predictions

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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
Trout seasonSeason
1
2
2
2
2
2
2
2
2
2
2
1
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
Permits & access
Permit required — see local rules.
  • CDFW regulations — verify.
What's coming
Plan ahead
5-day outlook
Condition match
77%
Cloud70%
Wind65%
Temp100%

A good match for Lake Almanor — most conditions are close to what it fishes best in.

Other water nearby · 5
Gallery · 2
  1. Misty morning at Lake Almanor with a fishing boat at the dock and Mount Lassen rising in the background, Plumas County, California
    Lake Almanor with Mount Lassen
  2. Terrain map of the venue
    Terrain map
About this water

Big reservoir up in the Lassen country, and the whole calendar bends around one thing: the early-summer Hexagenia hatch. Those big mayflies come off at last light in June, and the browns and rainbows that ignore you all day suddenly lose their composure — be on the water at dusk or don't bother coming. The rest of the year you fish the cold-water "springs" lies with damsels, leeches and streamers. It fishes year-round, but June evenings are the event everyone drives in for.

  • Reservoir
  • Mixed
Water quality · US Clean Water Act
  • Aquatic lifeSupporting
  • Fish consumptionImpaired
What this classification means

Fish consumption: Consumption advisory (Mercury) — fish for sport, not the table.

EPA ATTAINS assessment unit 'Almanor Lake' (CAL5184100020020418094956), 2024 Integrated Report. Aquatic Life use: Fully Supporting. Listed impairment causes: Mercury. 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) · CAL5184100020020418094956

Why this score
  • Temperature (cool) is in the sweet spot for summer fishing.
Directions
Seasons & zones
  • Trout1 January31 December
Related guides
Booking & contacts