When was Ostle Reservoir (; Antelope Butte) last stocked?

The latest reported stocking was Sep 11, 2026 (rainbow trout, 1 fish), according to Montana agency reports.

How often is Ostle Reservoir (; Antelope Butte) stocked?

It was stocked 1 times in the last 12 months.

What kind of trout are stocked in Ostle Reservoir (; Antelope Butte)?

Rainbow trout (4 stockings, 2,202 fish).

Ostle Reservoir (; Antelope Butte) trout stocking

Montana · lake

Ostle Reservoir (; Antelope Butte) was last stocked 2 weeks ago (Sep 11, 2026). We have 4 stockings on record since Jun 26, 2025, 1 in the last 12 months (2 fish). Species stocked: rainbow trout.

Last stocked

2 weeks ago

Sep 11, 2026

Next planned

Not announced

Last 12 months

1 stocking

2 fish

On record

4 stockings

since Jun 26, 2025

Weather at Ostle Reservoir (; Antelope Butte)

Tonight
57°F
Partly Cloudy
wind 7 mph
Friday
80°F
Mostly Sunny
wind 7 to 20 mph
Friday Night
41°F
Slight Chance Showers And Thunderstorms then Partly Cloudy
18% rain · wind 17 to 32 mph
Saturday
55°F
Mostly Sunny
wind 9 to 15 mph
Saturday Night
36°F
Partly Cloudy
wind 1 to 10 mph
Sunday
59°F
Partly Sunny
wind 1 to 5 mph

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

When is Ostle Reservoir (; Antelope Butte) stocked?

Stockings are spread across the year.

By month, all years

Stockings of Ostle Reservoir (; Antelope Butte) 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

What is stocked

Species	Stockings	Fish	Fish per stocking	Typical size
Rainbow trout	4	2,202	551	4.0 in

Stocking history

Date	Species	Fish	Hatchery
Sep 11, 2026	Rainbow trout	1	Giant Springs Trout Hatchery
Sep 11, 2026	Rainbow trout	1	Giant Springs Trout Hatchery
Jun 26, 2025	Rainbow trout	1,200	Giant Springs Trout Hatchery
Jun 26, 2025	Rainbow trout	1,000	Giant 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 Ostle Reservoir (; Antelope Butte)?

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 Ostle Reservoir (; Antelope Butte)

Perkins Pondlake · 11 mistocked Jun 17, 2026
Our Lakelake · 13 mistocked Sep 17, 2025
Eureka Reservoirlake · 16 mistocked May 20, 2025
Pishkun Reservoirlake · 21 mistocked May 1, 2026
Tunnel Lakelake · 22 mistocked May 21, 2026
Sock Lakelake · 23 mistocked Sep 17, 2025
Kelly Reservoirlake · 25 mistocked Jun 17, 2026

Stocked this week in Montana

Questions about Ostle Reservoir (; Antelope Butte)

When was Ostle Reservoir (; Antelope Butte) last stocked?: The latest reported stocking was Sep 11, 2026 (rainbow trout, 1 fish), according to Montana agency reports.
How often is Ostle Reservoir (; Antelope Butte) stocked?: It was stocked 1 times in the last 12 months.
What kind of trout are stocked in Ostle Reservoir (; Antelope Butte)?: Rainbow trout (4 stockings, 2,202 fish).