When was Halfmoon Lake last stocked?

The latest reported stocking was May 8, 2026 (brook trout, 4,435 fish), according to Montana agency reports.

How often is Halfmoon Lake stocked?

It was stocked 1 times in the last 12 months.

What kind of trout are stocked in Halfmoon Lake?

Brook trout (2 stockings, 8,435 fish).

Halfmoon Lake trout stocking

Montana · lake

Halfmoon Lake was last stocked 5 months ago (May 8, 2026). We have 2 stockings on record since Apr 27, 2025, 1 in the last 12 months (4,435 fish). Species stocked: brook trout.

Last stocked

5 months ago

May 8, 2026

Next planned

Not announced

Last 12 months

1 stocking

4,435 fish

On record

2 stockings

since Apr 27, 2025

River conditions

Nearest USGS gage: M F Flathead River near West Glacier MT (3 km away, on a different stream or lake).

Flow: 928 cfs; about normal for the last six weeks
Gage height: 2.21 ft

Water temperature (daily high), last six weeks (°F), daily. Latest: 53 °F on Aug 30. The green band is the ideal range for trout.

Streamflow, last six weeks (cfs), daily. Latest: 978 cfs on Sep 23.

Latest reading Sep 25, 2026, 2:45 AM UTC. USGS data are provisional. Gage page at USGS.

Weather at Halfmoon Lake

Tonight
48°F
Partly Cloudy
1% rain · wind 1 mph
Friday
74°F
Mostly Sunny then Slight Chance Light Rain
23% rain · wind 5 to 16 mph
Friday Night
39°F
Light Rain Likely
74% rain · wind 7 to 12 mph
Saturday
54°F
Slight Chance Light Rain then Mostly Cloudy
19% rain · wind 7 mph
Saturday Night
33°F
Partly Cloudy then Areas Of Fog
wind 0 to 3 mph
Sunday
60°F
Areas Of Fog then Partly Sunny
wind 1 mph

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

What is stocked

Species	Stockings	Fish	Fish per stocking	Typical size
Brook trout	2	8,435	4,218	3.6 in

Stocking history

Date	Species	Fish	Pounds	Hatchery
May 8, 2026	Brook trout	4,435		Giant Springs Trout Hatchery
Apr 27, 2025	Brook trout	4,000		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 Halfmoon Lake?

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 Halfmoon Lake

Lake Fivelake · 1 mistocked May 8, 2026
Lion Lakelake · 7 mistocked Jun 4, 2026
Rivers Edge Pondlake · 10 mistocked Jun 4, 2026
Beta Lakelake · 11 mistocked Jul 26, 2025
Fawn Lakelake · 11 mistocked Jul 26, 2025
Doris Lake 2lake · 12 mistocked Sep 23, 2025
Doris Lake 1lake · 12 mistocked Sep 23, 2025
Whitefish Lakelake · 17 mistocked Apr 16, 2025

Stocked this week in Montana

Questions about Halfmoon Lake

When was Halfmoon Lake last stocked?: The latest reported stocking was May 8, 2026 (brook trout, 4,435 fish), according to Montana agency reports.
How often is Halfmoon Lake stocked?: It was stocked 1 times in the last 12 months.
What kind of trout are stocked in Halfmoon Lake?: Brook trout (2 stockings, 8,435 fish).