Big Reservoir trout stocking
Valley County, Montana · lake · 2,621 ft elevation
Big Reservoir was last stocked 6 months ago (May 8, 2026). We have 2 stockings on record since May 17, 2025, 1 in the last 12 months (2,500 fish). Species stocked: rainbow trout.
Last stocked
6 months ago
May 8, 2026
Next planned
Not announced
Last 12 months
1 stocking
2,500 fish
On record
2 stockings
since May 17, 2025
- Number 6 of 10 stocked waters in Valley County by stocking days.
- Stocked about as often as a typical Montana water on our record.
Weather at Big Reservoir
- Overnight36°FPartly Cloudywind 7 to 10 mph
- Sunday62°FMostly Cloudywind 9 to 13 mph
- Sunday Night37°FMostly Cloudy1% rain · wind 9 to 17 mph
- Monday51°FPartly Sunnywind 3 to 9 mph
- Monday Night35°FMostly Cloudy5% rain · wind 5 mph
- Tuesday55°FMostly Sunny5% rain · wind 3 to 17 mph
Forecast from the National Weather Service for this location, refreshed hourly.
What is stocked
| Species | Stockings | Fish | Fish per stocking | Typical size |
|---|---|---|---|---|
| Rainbow trout | 2 | 5,000 | 2,500 | 3.2 in |
Stocking history
20261 stocking · 2,500 fish
| Date | Species | Fish | Size | Since previous | Hatchery |
|---|---|---|---|---|---|
May 8Latest Friday | Rainbow trout | 2,500 | 2.2 in | 356 days | Fort Peck Hatchery |
20251 stocking · 2,500 fish
| Date | Species | Fish | Size | Since previous | Hatchery |
|---|---|---|---|---|---|
May 17 Saturday | Rainbow trout | 2,500 | 3.2 in | Fort Peck 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. Seasons and limits: Montana fishing regulations.
Where is Big Reservoir?
Valley County, Montana. The marker is the agency's location for this water; streams are often stocked at several access points.
Stocked waters near Big Reservoir
- Glasgow Base Pond (; Glasgow AFB Pond, Upper)lake · 10 mistocked Sep 15, 2026
- VR 009 Reservoir (; Glasgow AFB Pond, Lower)lake · 10 mistocked Jun 16, 2026
- Home Run Pondlake · 13 mistocked Sep 15, 2026
- Shoot Reservoirlake · 19 mistocked Jun 11, 2025
- Fort Peck Trout Pondlake · 19 mistocked Oct 1, 2026
- Milk River (Lower Milk River, Upper Milk River, Middle Milk River)stream · 20 mistocked May 6, 2026
- Flat Lakelake · 22 mistocked Jun 5, 2025
All stocked waters in Valley CountyStocked this week in Montana
Questions about Big Reservoir
- When was Big Reservoir last stocked?
- The latest reported stocking was May 8, 2026 (rainbow trout, 2,500 fish), according to Montana agency reports.
- How often is Big Reservoir stocked?
- It was stocked once in the last 12 months.
- Is Big Reservoir stocked often?
- Number 6 of 10 stocked waters in Valley County by stocking days. Stocked about as often as a typical Montana water on our record. We count each day the agency reported stocking it.
- What kind of trout are stocked in Big Reservoir?
- Rainbow trout (2 stockings, 5,000 fish).