Where is Lewiston Lake?

Lewiston Lake is a lake in Trinity County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.

How deep is Lewiston Lake?

Lewiston Lake has a maximum depth of 65 feet and an average depth of 7 feet. The lake covers 674 acres.

Are there boat ramps on Lewiston Lake?

Lewiston Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Trinity Lake National Recreation Area (Pine Cove ), Pine Cove Marina. Public access is listed as yes.

Can I fish at Lewiston Lake?

Lewiston Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by California's fish and wildlife agency, so check its current regulations before you go.

Are there campgrounds on Lewiston Lake?

Lewiston Lake has 6 public campgrounds from USGS The National Map within 5 km, including Tunnel Rock Cg-F, Cooper Gulch Campground, Cooper Gulch Cg-F, Ackerman Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.

Lewiston Lake

Trinity County, California674 acresView map Directions

No nutrient or algae sampling on record from SWRCB for this lake.

Max depth

65 ft

Bathymetric survey

Area

674 acres

Surface area

Shoreline

16.6 mi

Measured length

65 ft max depth
Public access
Limited data

See the measurements Directions Where to stay

Lewiston Lake in Trinity County, California has water-quality measurements published by SWRCB, shown here as reported. Maximum depth: 65 ft. Surface area: 674 acres.

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Lewiston Lake is a 674-acre lake in Trinity County, California with a maximum depth of 65 feet (7-foot average). Limited fish-species data available. Public access is available with 2 public boat landings.

Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.

What Lewiston Lake is good for

From access and monitoring records, not editorial picks.

Boat launch2 documented ramps
Camping6 public campgrounds nearby
Deep water65 ft surveyed max depth

Swimming conditions

No reading

Limited data

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Lewiston Lake is safe to swim in today is a call for the California State Water Resources Control Board and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Lewiston Lake

These are the measurements SWRCB publishes for Lewiston Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

No clarity data.

Ask about Lewiston Lake

Answers come straight from the public measurements and survey records on this page.

Lake Details

Max depth

65 ft

Average depth

7 ft

Surface area

674 acres

Shoreline

16.6 mi

Public access

Yes

Listed by SWRCB

Recreation & Access

Boat Landings

Yes

Public Access

Campgrounds

Trinity Lake National Recreation Area (Pine Cove )Public
Pine Cove MarinaPublic

Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps

Public campgrounds near Lewiston Lake

Tunnel Rock Cg-F1.4 km
Cooper Gulch Campground2.4 kmReserve
Cooper Gulch Cg-F2.4 km
Ackerman Campground2.9 kmReserve
Ackerman Cg-F3.0 km
Mary Smith Cg-F3.8 km

Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes

Stays via Stay22

Stays near Lewiston Lake

Compare lakeside cabins, hotels, and vacation rentals near Lewiston Lake in Trinity County, California — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

Top-rated places to stay near Lewiston Lake

Prices for Oct 16–18, 4 adults. Change dates on the map below.

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Follow Lewiston Lake’s readings

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Fishing Lewiston Lake

→ Lewiston Lake fishing regulations (limits, seasons, special rules)

Nearby Lakes in Trinity County

Trinity Lake12.5 miView →Sapphire Lake20.3 miView →Papoose Lake—View →Grizzly Lake—View →Stoddard Lake—View →Ewing Reservoir—View →

Frequently asked questions about Lewiston Lake

Where is Lewiston Lake?: Lewiston Lake is a lake in Trinity County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Lewiston Lake?: Lewiston Lake in Trinity County, California has water-quality measurements published by SWRCB, shown here as reported. Maximum depth: 65 ft. Surface area: 674 acres.
Is Lewiston Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Lewiston Lake?: Lewiston Lake has a maximum depth of 65 feet and an average depth of 7 feet. The lake covers 674 acres.
Are there boat ramps on Lewiston Lake?: Lewiston Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Trinity Lake National Recreation Area (Pine Cove ), Pine Cove Marina. Public access is listed as yes.
Can I fish at Lewiston Lake?: Lewiston Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by California's fish and wildlife agency, so check its current regulations before you go.
Are there campgrounds on Lewiston Lake?: Lewiston Lake has 6 public campgrounds from USGS The National Map within 5 km, including Tunnel Rock Cg-F, Cooper Gulch Campground, Cooper Gulch Cg-F, Ackerman Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.