When was Marias River last stocked?

The latest reported stocking was Jul 17, 2026 (rainbow trout, 5,004 fish), according to Montana agency reports.

How often is Marias River stocked?

It was stocked 1 times in the last 12 months. Across all years on record, most stockings come in July.

What kind of trout are stocked in Marias River?

Rainbow trout (3 stockings, 16,834 fish); Brown trout (1 stocking, 4,400 fish).

Marias River trout stocking

Montana · stream

Marias River was last stocked 2 months ago (Jul 17, 2026). We have 4 stockings on record since Jul 17, 2025, 1 in the last 12 months (5,004 fish). Most stockings come in July. Species stocked: rainbow trout, brown trout.

Last stocked

2 months ago

Jul 17, 2026

Next planned

Not announced

Last 12 months

1 stocking

5,004 fish

On record

4 stockings

since Jul 17, 2025

River conditions

Nearest USGS gage: Teton River at Loma MT (2 km away, on a different stream or lake).

Flow: 257 cfs; much higher than usual for the last six weeks
Gage height: 1.73 ft

Streamflow, last six weeks (cfs), daily. Latest: 264 cfs on Sep 23.

Latest reading Sep 25, 2026, 2:30 AM UTC. USGS data are provisional. Gage page at USGS.

Weather at Marias River

Tonight
56°F
Mostly Clear
wind 8 to 12 mph
Friday
90°F
Sunny
wind 7 to 10 mph
Friday Night
50°F
Slight Chance Showers And Thunderstorms then Mostly Cloudy
17% rain · wind 13 to 21 mph
Saturday
66°F
Sunny
wind 14 to 18 mph
Saturday Night
43°F
Partly Cloudy
wind 2 to 15 mph
Sunday
66°F
Partly Sunny
wind 5 mph

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

When is Marias River stocked?

Most stockings come in July.

By month, all years

Stockings of Marias River by month, all years on record. This month is shown in blue.

Year by year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2026							1
2025							1		1

What is stocked

Species	Stockings	Fish	Fish per stocking	Typical size
Rainbow trout	3	16,834	5,611	7.3 in
Brown trout	1	4,400	4,400	6.6 in

Stocking history

Date	Species	Fish	Hatchery
Jul 17, 2026	Rainbow trout	5,004	Big Springs Trout Hatchery
Sep 3, 2025	Brown trout	4,400	Big Springs Trout Hatchery
Sep 3, 2025	Rainbow trout	7,752	Big Springs Trout Hatchery
Jul 17, 2025	Rainbow trout	4,078	Big 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 Marias River?

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

Directions Larger map

Stocked waters near Marias River

Schoonover Reservoir 2lake · 6 mistocked Jun 22, 2026
Crow Coulee Reservoirlake · 11 mistocked Jun 18, 2026
Leningtons Reservoirlake · 11 mistocked Jun 22, 2026
Eightmile Springs (; Tunis)lake · 18 mistocked May 13, 2026
Lanning Reservoirlake · 23 mistocked Jun 15, 2026

Stocked this week in Montana

Questions about Marias River

When was Marias River last stocked?: The latest reported stocking was Jul 17, 2026 (rainbow trout, 5,004 fish), according to Montana agency reports.
How often is Marias River stocked?: It was stocked 1 times in the last 12 months. Across all years on record, most stockings come in July.
What kind of trout are stocked in Marias River?: Rainbow trout (3 stockings, 16,834 fish); Brown trout (1 stocking, 4,400 fish).