CaliforniaReservoirTrinity County

Trinity Lake

Fed by the Trinity River, Trinity Lake holds roughly 16,400 acres of water in California. You will find it in Trinity County. It is managed by USDA Forest Service (Shasta-Trinity NF). The gauge last read 2,322.65 ft.

Water level today: 2,322.65 ft · see the full record

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CountiesTrinity County

Coordinates40.8225, -122.7650

Surface area16,400 acres

RiverTrinity River

Managed byUSDA Forest Service (Shasta-Trinity NF)

Swimming beaches on Trinity Lake

2 named swimming spots and shoreline access points, from USGS GNIS, Recreation.gov and the Forest Service. None is staffed by a lifeguard unless the operating agency posts one.

Trinity Lake

Clark Springs Day Use Area and Beach

3.5 mi from the lake center.

Recreation.gov (RIDB)Swimming

Trinity Lake

Stoney Creek Swim Area

Managed by Shasta-Trinity National Forest; open May 20 to Sept. 12; fee information published, published season; 4.9 mi from the…

USDA Forest ServiceSwimmingFee Information PublishedPublished Season

Trinity Lake on the map

Lake center, swimming spots and access points.

Get directions

Weather and water temperature

Air temperature and wind from Open-Meteo. Water temperature only when the lake has a public sensor.

Weather data by Open-Meteo

Water level today

The level comes from CDEC - California Data Exchange Center (DWR). A falling pool widens the beaches and shortens the ramps, so it is worth checking before you drive out.

2,322.65 ft -1.70 ft in 7 days

Reading of Sep 9, 2026 · source: CDEC - California Data Exchange Center (DWR)

Full water level record for Trinity Lake

Trinity Lake: access and conditions

The center of the lake is at 40.8225, -122.7650. Outflow feeds the Trinity River. Surface elevation is about 2,387 feet.

The closest lakes in this guide are Lewiston Lake (California, 6 mi), Whiskeytown Lake (California, 19 mi) and Shasta Lake (California, 21 mi). In all, 86 lakes in California are covered here.

Inland lakes are not monitored the way ocean beaches are, so posted signs matter more here. Most California day-use areas open for the summer season and close outside it. Water temperature is not measured at this lake by any public agency we read.

The level comes from CDEC - California Data Exchange Center (DWR). A falling pool widens the beaches and shortens the ramps, so it is worth checking before you drive out.

Around Trinity Lake this guide maps 2 named swimming spots. They include Clark Springs Day Use Area and Beach and Stoney Creek Swim Area. These come from Recreation.gov (RIDB) and USDA Forest Service. Facilities vary from one access point to the next, so check before you rely on one.

Questions about Trinity Lake

Can you swim in Trinity Lake?

Yes. This guide maps 2 named swimming spots around the lake, including Clark Springs Day Use Area and Beach and Stoney Creek Swim Area. None is staffed by a lifeguard unless the operating agency posts one.

How big is Trinity Lake?

About 16,400 acres.

What other lakes are near Trinity Lake?

The closest in this guide is Lewiston Lake, about 6 miles away in California.