Upland Natural Lake · Mixed · Montana, US

Quake Lake

Earthquake Lake (Madison County, Montana, USA) 8

Quake Lake is what happened when the 1959 earthquake dropped a mountainside into the Madison and dammed it overnight.

Fair · Trout
Balanced Leech · 8-12
A respectable few hours, if you choose your moments
Good wave on — drift country. A useful wave. Work the productive shore.
49% confidence
limited data

Quake Lake is often best in spring through autumn.

What moved it
  • WindS 15 km/hGentle breeze
Today's fly
Balanced Leech
Balanced Leech8-12
Proven pattern for this period
Conditions on the water
Estimate
Wind
Gentle breeze
S 15 km/h
N
S
from the south
Wave20 cm ripple
Water temp9.3°C
Air temp2°C
CloudOvercast
Pressure1028 hPa
Rain · recent0.0 mm

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

How to fish it · for Trout
When
No strong hatch signals at the moment — general searching tactics should work best. The ripple is helpful — fish should move onto the feed and a slow-drifted team or single wet will cover water well.
Where
Set up a broadside drift and cover the water systematically. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point.
The plan
Plan A

Set up a broadside drift and cover the water systematically. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point.

Plan B

If the main plan is not working, switch to a smaller, more imitative pattern fished slower and deeper. A change of drift angle can also make a difference.

Watch for

Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.

Boat — drift

A gentle ripple is ideal for drifting — broadside drift covering the wind lanes should be productive.

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 4 guilds as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 3 as a supporter.

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Through the year
0–3 scale · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Flying AntsHatch
1
2
1
Gray DrakeHatch
1
1
CallibaetisHatch
1
2
2
2
1

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

Ranked for today
Trout fly box
CH
Chironomid
12-16 · Pattern
Proven pattern for this period
Permits & access
Permit required — see local rules.
  • Montana stillwater regulations — check FWP.
What's coming
Plan ahead
5-day outlook
Condition match
59%
Cloud50%
Wind65%
Temp60%

A reasonable day here, though cloud isn't quite in the sweet spot.

Other water nearby · 5
Gallery · 2
  1. Earthquake Lake (Madison County, Montana, USA) 8
  2. Terrain map of the venue
    Terrain map
About this water

Quake Lake is what happened when the 1959 earthquake dropped a mountainside into the Madison and dammed it overnight. The drowned timber still stands, gray and skeletal, and wild browns and rainbows live in and around it. Fishing here is atmospheric in a slightly haunted way and technical besides — work the edges of the dead trees, and keep half a mind on the snags, because they'll grab a fly or a leader the second you stop paying attention.

  • Lake
  • Mixed
Water quality · US Clean Water Act
  • Aquatic life: Not assessed
What this classification means

EPA ATTAINS assessment unit 'Quake Lake' (MT41F005_020), 2021 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) · MT41F005_020

Why this score
  • autumn conditions with overcast skies and breezy wind.
Directions
Seasons & zones
  • Trout Third Saturday of May → Last day of November
Related guides
Booking & contacts