When was Dean Reservoir last stocked?

The latest reported stocking was Jun 4, 2026 (rainbow trout, 100 fish), according to Montana agency reports.

How often is Dean Reservoir stocked?

It was stocked once in the last 12 months.

Is Dean Reservoir stocked often?

Number 8 of 10 stocked waters in Custer County by stocking days. Stocked less often than most Montana waters on our record. We count each day the agency reported stocking it.

What kind of trout are stocked in Dean Reservoir?

Rainbow trout (1 stocking, 100 fish).

Dean Reservoir trout stocking

Custer County, Montana · lake · 2,881 ft elevation

Dean Reservoir was last stocked 5 months ago (Jun 4, 2026). We have 1 stocking on record since Jun 4, 2026, 1 in the last 12 months (100 fish). Species stocked: rainbow trout.

Last stocked

5 months ago

Jun 4, 2026

Next planned

Not announced

Last 12 months

1 stocking

100 fish

On record

1 stocking

since Jun 4, 2026

Number 8 of 10 stocked waters in Custer County by stocking days.
Stocked less often than most Montana waters on our record.

Weather at Dean Reservoir

This Afternoon
65°F
Mostly Sunny
wind 9 mph
Tonight
39°F
Slight Chance Rain Showers then Mostly Cloudy
15% rain · wind 8 mph
Monday
55°F
Mostly Sunny
9% rain · wind 6 mph
Monday Night
38°F
Mostly Cloudy
8% rain · wind 7 mph
Tuesday
58°F
Partly Sunny
8% rain · wind 6 to 16 mph
Tuesday Night
37°F
Partly Cloudy
1% rain · wind 9 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	1	100	100	6.9 in

Stocking history

20261 stocking · 100 fish

Date	Species	Fish	Size	Hatchery
Jun 4Latest Thursday	Rainbow trout	100	6.9 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 Dean Reservoir?

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

Directions Larger map Montana fishing regulations

Stocked waters near Dean Reservoir

Roerick Pondlake · 6 mistocked Apr 29, 2026
Spotted Eagle Lake (; Speckled Bird)lake · 8 mistocked Jul 1, 2026
Tongue Riverstream · 9 mistocked Jun 3, 2026
Cap Rock Reservoirlake · 22 mistocked Jun 17, 2026

All stocked waters in Custer County Stocked this week in Montana

Questions about Dean Reservoir

When was Dean Reservoir last stocked?: The latest reported stocking was Jun 4, 2026 (rainbow trout, 100 fish), according to Montana agency reports.
How often is Dean Reservoir stocked?: It was stocked once in the last 12 months.
Is Dean Reservoir stocked often?: Number 8 of 10 stocked waters in Custer County by stocking days. Stocked less often than most Montana waters on our record. We count each day the agency reported stocking it.
What kind of trout are stocked in Dean Reservoir?: Rainbow trout (1 stocking, 100 fish).