When was Johnson Reservoir last stocked?

The latest reported stocking was May 17, 2025 (rainbow trout, 2,500 fish), according to Montana agency reports.

Is Johnson Reservoir stocked often?

Tied for the most stocked water in Sweet Grass County (1 stocking days on record). 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 Johnson Reservoir?

Rainbow trout (1 stocking, 2,500 fish).

Johnson Reservoir trout stocking

Sweet Grass County, Montana · lake · 4,018 ft elevation

Johnson Reservoir was last stocked 18 months ago (May 17, 2025). We have 1 stocking on record since May 17, 2025. Species stocked: rainbow trout.

Last stocked

18 months ago

May 17, 2025

Next planned

Not announced

Last 12 months

0 stockings

On record

1 stocking

since May 17, 2025

Tied for the most stocked water in Sweet Grass County (1 stocking days on record).
Stocked less often than most Montana waters on our record.

Weather at Johnson Reservoir

Today
54°F
Sunny
wind 5 mph
Tonight
30°F
Mostly Clear
wind 0 to 3 mph
Thursday
57°F
Mostly Sunny then Slight Chance Rain Showers
15% rain · wind 3 to 9 mph
Thursday Night
34°F
Slight Chance Rain Showers
15% rain · wind 6 to 12 mph
Friday
56°F
Sunny
wind 8 to 20 mph
Friday Night
37°F
Partly Cloudy
wind 8 to 20 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	2,500	2,500	3.2 in

Stocking history

20251 stocking · 2,500 fish

Date	Species	Fish	Size	Hatchery
May 17Latest 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 Johnson Reservoir?

Sweet Grass 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 Johnson Reservoir

Deveraux Pond #1lake · 22 mistocked May 16, 2025
Bokma Reservoirlake · 25 mistocked Dec 15, 2025

All stocked waters in Sweet Grass County Stocked this week in Montana

Questions about Johnson Reservoir

When was Johnson Reservoir last stocked?: The latest reported stocking was May 17, 2025 (rainbow trout, 2,500 fish), according to Montana agency reports.
Is Johnson Reservoir stocked often?: Tied for the most stocked water in Sweet Grass County (1 stocking days on record). 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 Johnson Reservoir?: Rainbow trout (1 stocking, 2,500 fish).