When was Twin Lakes, Mammoth last stocked?

The latest reported stocking was Aug 23 to 29, 2026, according to California agency reports.

How often is Twin Lakes, Mammoth stocked?

It was stocked 4 times in the last 12 months. Across all years on record, most stockings come in May and October.

Is Twin Lakes, Mammoth stocked often?

Number 15 of 38 stocked waters in Mono County by stocking days. Stocked more often than 63% of California waters on our record. We count each day the agency reported stocking it.

How warm is the water near Twin Lakes, Mammoth?

The nearest USGS gage read 36°F on Nov 9. Trout are sluggish below about 45°F. Fish slow and deep, midday is often best.

Twin Lakes, Mammoth trout stocking

Mono County, California · lake · 8,584 ft elevation

Twin Lakes, Mammoth was last stocked 3 months ago (Aug 23 to 29, 2026). We have 6 stockings on record since Oct 19, 2025, 4 in the last 12 months. Most stockings come in May and October.

Last stocked

3 months ago

Aug 23 to 29, 2026

Next planned

Not announced

Last 12 months

4 stockings

Water temperature

36°F

Cold for trout

Number 15 of 38 stocked waters in Mono County by stocking days.
Stocked more often than 63% of California waters on our record.

River conditions

Nearest USGS gage: MF SAN JOAQUIN R NR MAMMOTH LAKES CA (7 km away, on a different stream or lake).

Water temperature: 36°F
Flow: 6 cfs; about normal for the last six weeks
Gage height: 2.49 ft

Cold for trout. Trout are sluggish below about 45°F. Fish slow and deep, midday is often best.

Streamflow, last six weeks (cfs), daily. Latest: 7 cfs on Nov 7.

Latest reading Nov 9, 2026, 9:00 AM UTC. USGS data are provisional. Gage page at USGS.

Weather at Twin Lakes, Mammoth

Overnight
34°F
Mostly Clear
wind 10 mph
Monday
49°F
Mostly Sunny
wind 5 to 10 mph
Monday Night
32°F
Partly Cloudy
wind 5 mph
Tuesday
50°F
Sunny
wind 5 mph
Tuesday Night
33°F
Clear
wind 5 to 10 mph
Veterans Day
51°F
Sunny
wind 0 to 5 mph

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

When is Twin Lakes, Mammoth stocked?

Most stockings come in May and October.

By month, all years

Stockings of Twin Lakes, Mammoth 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					2		1	1
2025										2

Stocking history

20264 stockings

Date	Species	Since previous
Week of Aug 23Latest Aug 23 to Aug 29	Trout	4 weeks
Week of Jul 26 Jul 26 to Aug 1	Trout	8 weeks
Week of May 31 May 31 to Jun 6	Trout	2 weeks
Week of May 17 May 17 to May 23	Trout	29 weeks

20252 stockings

Date	Species	Since previous
Week of Oct 26 Oct 26 to Nov 1	Trout	1 week
Week of Oct 19 Oct 19 to Oct 25	Trout

From California 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: California fishing regulations.

Where is Twin Lakes, Mammoth?

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

Directions Larger map California fishing regulations

Stocked waters near Twin Lakes, Mammoth

Mamie Lakelake · 1 mistocked Jul 26, 2026
Mary Lakelake · 1 mistocked Sep 13, 2026
George Lakelake · 1 mistocked Jun 21, 2026
Sherwin Creekstream · 4 mistocked Jul 12, 2026
Mammoth Creekstream · 5 mistocked Jun 21, 2026
Deadman Creekstream · 7 mistocked Jun 28, 2026
Convict Lakelake · 8 mistocked Aug 30, 2026
Convict Creekstream · 9 mistocked Sep 13, 2026

All stocked waters in Mono County Stocked this week in California

Questions about Twin Lakes, Mammoth

When was Twin Lakes, Mammoth last stocked?: The latest reported stocking was Aug 23 to 29, 2026, according to California agency reports.
How often is Twin Lakes, Mammoth stocked?: It was stocked 4 times in the last 12 months. Across all years on record, most stockings come in May and October.
Is Twin Lakes, Mammoth stocked often?: Number 15 of 38 stocked waters in Mono County by stocking days. Stocked more often than 63% of California waters on our record. We count each day the agency reported stocking it.
How warm is the water near Twin Lakes, Mammoth?: The nearest USGS gage read 36°F on Nov 9. Trout are sluggish below about 45°F. Fish slow and deep, midday is often best.