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 6 times in the last 12 months. Across all years on record, most stockings come in May and October.

How warm is the water near Twin Lakes, Mammoth?

The nearest USGS gage read 57°F on Sep 25. Prime range for trout (about 50 to 65°F): fish are feeding actively.

Twin Lakes, Mammoth trout stocking

Mono County, California · lake

Twin Lakes, Mammoth was last stocked 5 weeks ago (Aug 23 to 29, 2026). We have 6 stockings on record since Oct 19, 2025, 6 in the last 12 months. Most stockings come in May and October.

Last stocked

5 weeks ago

Aug 23 to 29, 2026

Next planned

Not announced

Last 12 months

6 stockings

Water temperature

57°F

Ideal for trout

River conditions

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

Water temperature: 57°F
Flow: 6 cfs; much lower than usual for the last six weeks
Gage height: 2.48 ft

Ideal for trout. Prime range for trout (about 50 to 65°F): fish are feeding actively.

Streamflow, last six weeks (cfs), daily. Latest: 7 cfs on Sep 23.

Latest reading Sep 25, 2026, 3:00 AM UTC. USGS data are provisional. Gage page at USGS.

Weather at Twin Lakes, Mammoth

Tonight
44°F
Patchy Smoke then Partly Cloudy
1% rain · wind 10 to 15 mph
Friday
55°F
Mostly Sunny
2% rain · wind 15 to 20 mph
Friday Night
38°F
Mostly Clear
wind 10 to 15 mph
Saturday
55°F
Mostly Sunny
wind 10 to 15 mph
Saturday Night
38°F
Partly Cloudy
wind 10 to 15 mph
Sunday
49°F
Sunny
1% rain · wind 15 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

Date	Species	Hatchery
Aug 23 to 29, 2026	Trout
Jul 26, 2026 to Aug 1, 2026	Trout
May 31, 2026 to Jun 6, 2026	Trout
May 17 to 23, 2026	Trout
Oct 26, 2025 to Nov 1, 2025	Trout
Oct 19 to 25, 2025	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.

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

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 6 times in the last 12 months. Across all years on record, most stockings come in May and October.
How warm is the water near Twin Lakes, Mammoth?: The nearest USGS gage read 57°F on Sep 25. Prime range for trout (about 50 to 65°F): fish are feeding actively.