Mountain Lake · Mixed · Montana

Hyalite Reservoir

Hyalite Reservoir with mountain reflections near Bozeman, Montana
Good · Cutthroat Trout
Callibaetis Nymph · 12-16
Goodlive now
Good summer conditions for Hyalite Reservoir
Good wave on — drift country. Drift fishing weather — three flies on a long leader.
65% confidence
What moved it
  • WindS 10 km/hLight breeze
Today's fly
CN
Callibaetis Nymph12-16
High-confidence seasonal pick
Conditions on the water
Live gauge
Wind
Light breeze
S 10 km/h
N
S
from the south
Wave20 cm ripple
Water temp—
Air temp17°C
CloudClear
Pressure1016 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Cutthroat Trout
When
The short high-country summer, June through September
Where
Start with Callibaetis Nymph (12-16) on a slow figure-of-eight retrieve. Early in the day, nymphs and buzzers fished slowly tend to outperform attractors.
The plan
Plan A

Start with Callibaetis Nymph (12-16) on a slow figure-of-eight retrieve. Early in the day, nymphs and buzzers fished slowly tend to outperform attractors.

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.

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

Hatch predictions

Top prey shown — see all 5 with Pro.

Start free trial

14-day free trial. Cancel anytime.

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
1
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Flying AntsHatch
1
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
Cutthroat Trout fly box
Permits & access
Permit required — see local rules.
  • Montana stillwater regulations — check FWP
  • Handle Arctic grayling with care.
What's coming
Plan ahead
5-day outlook
Condition match
78%
Cloud25%
Wind100%
Temp100%

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

Other water nearby · 5
Yellowstone River
25 km
10
Brown trout · Rainbow trout · Cutthroat trout
Gallatin River
31 km
Rainbow trout · Brown trout
Paradise Valley Spring Creeks
33 km
Rainbow trout · Brown trout
Shields River
53 km
Brown trout · Rainbow trout
Ennis Lake
57 km
Brown trout · Rainbow trout
Gallery · 2
  1. Hyalite Reservoir with mountain reflections near Bozeman, Montana
    Hyalite Reservoir, Bozeman, Montana
  2. Terrain map of the venue
    Terrain map
Water quality · US Clean Water Act
  • Aquatic life: Supporting
What this classification means

EPA ATTAINS assessment unit 'Hyalite Reservoir' (MT41H006_010), 2021 Integrated Report. Aquatic Life use: Fully Supporting. 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) · MT41H006_010

Why this score
  • Wind conditions (ripple) closely match what this water fishes best in.
  • Temperature (cool) is in the sweet spot for summer fishing.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • TroutThird Saturday of May → Last day of November
Related guides
Scotland Playbookloch & river fishingThermal Layers & Troutreading depth and temperatureEuro Nymphingsubsurface methods
Booking & contacts