TroutNearMe

Holter Reservoir trout stocking

Montana · lake

Holter Reservoir was last stocked 3 months ago (Jun 25, 2026). We have 29 stockings on record since Jun 25, 2025, 4 in the last 12 months (118,362 fish). Most stockings come in June. Species stocked: rainbow trout.

Last stocked
3 months ago
Jun 25, 2026
Next planned
Not announced
Last 12 months
4 stockings
118,362 fish
Water temperature
62°F
Ideal for trout

River conditions

USGS gage: Missouri River bl Holter Dam nr Wolf Cr MT (7 km away).

Water temperature
62°F
Flow
3,250 cfs
about normal for the last six weeks
Gage height
3.33 ft

Ideal for trout. Prime range for trout (about 50 to 65°F): fish are feeding actively.

485969Aug 11Sep 23
Water temperature (daily high), last six weeks (°F), daily. Latest: 62 °F on Sep 23. The green band is the ideal range for trout.
3,0123,2403,468Aug 11Sep 23
Streamflow, last six weeks (cfs), daily. Latest: 3,240 cfs on Sep 23.

Latest reading Sep 25, 2026, 2:45 AM UTC. USGS data are provisional. Gage page at USGS.

Weather at Holter Reservoir

  • Tonight
    57°F
    Mostly Clear
    wind 7 to 10 mph
  • Friday
    84°F
    Sunny
    wind 9 to 15 mph
  • Friday Night
    48°F
    Partly Cloudy
    12% rain · wind 7 to 16 mph
  • Saturday
    65°F
    Mostly Sunny
    wind 6 to 12 mph
  • Saturday Night
    44°F
    Partly Cloudy
    wind 0 to 8 mph
  • Sunday
    67°F
    Mostly Cloudy
    2% rain · wind 0 to 3 mph

Forecast from the National Weather Service for this location, refreshed hourly.

When is Holter Reservoir stocked?

Most stockings come in June. Stocked 4 times in 2026, mostly in June.

By month, all years

Jan: 0 stockingsJanFeb: 0 stockingsFebMar: 0 stockingsMarApr: 0 stockingsAprMay: 0 stockingsMayJun: 8 stockings8JunJul: 0 stockingsJulAug: 0 stockingsAugSep: 3 stockings3SepOct: 0 stockingsOctNov: 0 stockingsNovDec: 0 stockingsDec
Stockings of Holter Reservoir by month, all years on record. This month is shown in blue.

Year by year

JanFebMarAprMayJunJulAugSepOctNovDec
20264
202543

What is stocked

SpeciesStockingsFishFish per stockingTypical size
Rainbow trout29333,20211,4907.7 in

Stocking history

DateSpeciesFishPoundsHatchery
Jun 25, 2026Rainbow trout14,475Big Springs Trout Hatchery
Jun 24, 2026Rainbow trout14,007Big Springs Trout Hatchery
Jun 24, 2026Rainbow trout14,950Big Springs Trout Hatchery
Jun 24, 2026Rainbow trout14,600Big Springs Trout Hatchery
Jun 23, 2026Rainbow trout16,525Big Springs Trout Hatchery
Jun 23, 2026Rainbow trout15,000Big Springs Trout Hatchery
Jun 23, 2026Rainbow trout14,333Big Springs Trout Hatchery
Jun 22, 2026Rainbow trout14,472Big Springs Trout Hatchery
Sep 17, 2025Rainbow trout12,929Big Springs Trout Hatchery
Sep 17, 2025Rainbow trout12,950Big Springs Trout Hatchery
Sep 17, 2025Rainbow trout12,929Big Springs Trout Hatchery
Sep 16, 2025Rainbow trout11,640Big Springs Trout Hatchery
Sep 16, 2025Rainbow trout12,192Big Springs Trout Hatchery
Sep 16, 2025Rainbow trout12,546Big Springs Trout Hatchery
Sep 15, 2025Rainbow trout12,312Big Springs Trout Hatchery
Sep 15, 2025Rainbow trout12,275Big Springs Trout Hatchery
Sep 15, 2025Rainbow trout12,264Big Springs Trout Hatchery
Jun 30, 2025Rainbow trout5,661Big Springs Trout Hatchery
Jun 30, 2025Rainbow trout8,688Big Springs Trout Hatchery
Jun 30, 2025Rainbow trout9,971Big Springs Trout Hatchery
Show 9 older stockings
DateSpeciesFishPoundsHatchery
Jun 27, 2025Rainbow trout9,600Big Springs Trout Hatchery
Jun 27, 2025Rainbow trout9,239Big Springs Trout Hatchery
Jun 27, 2025Rainbow trout9,949Big Springs Trout Hatchery
Jun 26, 2025Rainbow trout1,083Big Springs Trout Hatchery
Jun 26, 2025Rainbow trout9,792Big Springs Trout Hatchery
Jun 26, 2025Rainbow trout9,025Big Springs Trout Hatchery
Jun 26, 2025Rainbow trout8,568Big Springs Trout Hatchery
Jun 25, 2025Rainbow trout9,971Big Springs Trout Hatchery
Jun 25, 2025Rainbow trout11,256Big Springs Trout Hatchery

From Montana fish and wildlife agency reports, collected nightly and kept after the agency takes them down. Agencies revise reports; check the agency's report before you go.

Where is Holter Reservoir?

Montana. The marker is the agency's location for this water; streams are often stocked at several access points.

DirectionsLarger map

Stocked waters near Holter Reservoir

Stocked this week in Montana

Questions about Holter Reservoir

When was Holter Reservoir last stocked?
The latest reported stocking was Jun 25, 2026 (rainbow trout, 14,475 fish), according to Montana agency reports.
How often is Holter Reservoir stocked?
Stocked 4 times in 2026, mostly in June. Across all years on record, most stockings come in June.
What kind of trout are stocked in Holter Reservoir?
Rainbow trout (29 stockings, 333,202 fish).
How warm is the water near Holter Reservoir?
The USGS gage read 62°F on Sep 25. Prime range for trout (about 50 to 65°F): fish are feeding actively.