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

Are there campgrounds on Loon Lake?

Loon Lake has 9 public campgrounds from USGS The National Map within 5 km, including Red Fir, Red Fir Gcg, Northshore, Northshore Campground - Loon Lake (CA). 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.

Loon Lake

El Dorado County, California992 acresView map Directions

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

Area

992 acres

Surface area

Shoreline

13.7 mi

Measured length

Impaired · Mercury
Limited data

See the measurements Directions Where to stay

Loon Lake in El Dorado County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 992 acres.

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Loon Lake is a 992-acre lake in El Dorado County, California.

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

What Loon Lake is good for

From access and monitoring records, not editorial picks.

Camping9 public campgrounds nearby

Swimming conditions

No reading

Limited data

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

Whether Loon 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 Loon Lake

These are the measurements SWRCB publishes for Loon 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 Loon Lake

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

Lake Details

Surface area

992 acres

Shoreline

13.7 mi

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

Recreation & Access

Campgrounds

Public campgrounds near Loon Lake

Red Fir0.5 kmReserve
Red Fir Gcg0.6 km
Northshore0.9 km
Northshore Campground - Loon Lake (CA)0.9 kmReserve
Wentworth Springs Campground2.0 km
Loon Lake Group Cg2.2 km
Loon Lake Cg2.3 km
Loon Lake Chalet2.4 kmReserve
Loon Lake Equestrian2.4 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 Loon Lake

Compare lakeside cabins, hotels, and vacation rentals near Loon Lake in El Dorado 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 Loon Lake

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

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Follow Loon Lake’s readings

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Fishing Loon Lake

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

EPA Impairment Status

Loon Lake 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 CAL5144401220091208154522 · Official waterbody report

Nearby Lakes in El Dorado County

Spider Lake2.1 miView →Buck Island Lake3 miView →Rockbound Lake3.8 miView →Rubicon Reservoir4.8 miView →Gerle Creek Divide Reservoir5 miView →Lake Schmidell7.2 miView →

Frequently asked questions about Loon Lake

Where is Loon Lake?: Loon Lake is a lake in El Dorado County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Loon Lake?: Loon Lake in El Dorado County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 992 acres.
Is Loon Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Loon Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Are there campgrounds on Loon Lake?: Loon Lake has 9 public campgrounds from USGS The National Map within 5 km, including Red Fir, Red Fir Gcg, Northshore, Northshore Campground - Loon Lake (CA). 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.