Where is Lake Sonoma?

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

Are there campgrounds on Lake Sonoma?

Lake Sonoma has 1 public campground from USGS The National Map within 5 km, including Liberty Glen (lake Sonoma). 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.

Lake Sonoma

Sonoma County, California2,235 acresView map Directions

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

Area

2,235 acres

Surface area

Shoreline

54.8 mi

Measured length

Impaired · Mercury
Limited data

See the measurements Directions Where to stay

Lake Sonoma in Sonoma County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 2235 acres.

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Lake Sonoma is a 2,235-acre lake in Sonoma County, California.

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

What Lake Sonoma is good for

From access and monitoring records, not editorial picks.

Camping1 public campground nearby
Big water2,235 acres

Swimming conditions

No reading

Limited data

Nutrient and algae readings are not a swimming clearance. Lake Sonoma is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.

Whether Lake Sonoma 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 Lake Sonoma

These are the measurements SWRCB publishes for Lake Sonoma, 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 Lake Sonoma

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

Lake Details

Surface area

2,235 acres

Shoreline

54.8 mi

No bathymetric survey has been published for Lake Sonoma, so its depth is not documented here.

Recreation & Access

Campgrounds

Public campgrounds near Lake Sonoma

Liberty Glen (lake Sonoma)2.7 kmReserve

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 Lake Sonoma

Compare lakeside cabins, hotels, and vacation rentals near Lake Sonoma in Sonoma 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 Lake Sonoma

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

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

Follow Lake Sonoma’s readings

Email me when new measurements post for this lake. Updates stay free.

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Fishing Lake Sonoma

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

EPA Impairment Status

Lake Sonoma is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Mercury

Designated uses not supporting: Fish consumption, Other.

Source: EPA ATTAINS assessment unit CAL1142403020020720145307 · Official waterbody report

Nearby Lakes in Sonoma County

Merlo Lake4.8 miView →Lytton Lake11.7 miView →Santa Rosa Creek Reservoir—View →Lake Ilsanjo—View →Laguna Lake—View →

Frequently asked questions about Lake Sonoma

Where is Lake Sonoma?: Lake Sonoma is a lake in Sonoma County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Lake Sonoma?: Lake Sonoma in Sonoma County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 2235 acres.
Is Lake Sonoma safe to swim in?: Nutrient and algae readings are not a swimming clearance. Lake Sonoma is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Are there campgrounds on Lake Sonoma?: Lake Sonoma has 1 public campground from USGS The National Map within 5 km, including Liberty Glen (lake Sonoma). 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.