Merlo Lake 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 Merlo Lake?

Merlo Lake has 2 public campgrounds from USGS The National Map within 5 km, including Boat-In Sites (lake Sonoma), Warm Springs Rec Area. 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.

Merlo Lake

Sonoma County, California44 acresView map Directions

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

Area

44 acres

Surface area

Shoreline

2 mi

Measured length

See the measurements Directions Where to stay

Merlo Lake in Sonoma County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 44 acres.

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Merlo Lake is a 44-acre lake in Sonoma County, California.

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

What Merlo Lake is good for

From access and monitoring records, not editorial picks.

Camping2 public campgrounds nearby

Swimming conditions

No reading

Not rated

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

Whether Merlo 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.

Get alerts for Merlo Lake →

Water quality measurements for Merlo Lake

These are the measurements SWRCB publishes for Merlo 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. TSI undefined.

Ask about Merlo Lake

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

Lake Details

Surface area

44 acres

Shoreline

2 mi

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

Recreation & Access

Campgrounds

Public campgrounds near Merlo Lake

Boat-In Sites (lake Sonoma)1.8 kmReserve
Warm Springs Rec Area2.8 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 Merlo Lake

Compare lakeside cabins, hotels, and vacation rentals near Merlo Lake 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 Merlo Lake

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 Merlo Lake’s readings

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

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Fishing Merlo Lake

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

Nearby Lakes in Sonoma County

Lake Sonoma4.8 miView →Lytton Lake7 miView →Santa Rosa Creek Reservoir—View →Lake Ilsanjo—View →Laguna Lake—View →

Frequently asked questions about Merlo Lake

Where is Merlo Lake?: Merlo Lake 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 Merlo Lake?: Merlo Lake in Sonoma County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 44 acres.
Is Merlo Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Are there campgrounds on Merlo Lake?: Merlo Lake has 2 public campgrounds from USGS The National Map within 5 km, including Boat-In Sites (lake Sonoma), Warm Springs Rec Area. 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.