Where is Thompson Lake?

Thompson Lake is a lake in Grant County, Washington. Its water-quality measurements are published by Washington Ecology and shown on this page as reported.

How deep is Thompson Lake?

Thompson Lake has a maximum depth of 25 feet. The lake covers 33 acres.

Are there campgrounds on Thompson Lake?

Thompson Lake has 4 public campgrounds from USGS The National Map within 5 km, including Steamboat Rock State Park Sage Loop Campground, Steamboat Rock State Park Cove Loop Campground, Steamboat Rock State Park Dune Loop Campground, Steamboat Rock State Park Bay Loop 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.

Thompson Lake

Grant County, Washington33 acresView map Directions

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

Max depth

25 ft

Bathymetric survey

Area

33 acres

Surface area

Shoreline

1 mi

Measured length

25 ft max depth

See the measurements Directions Where to stay

Thompson Lake in Grant County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Maximum depth: 25 ft. Surface area: 33 acres.

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Thompson Lake is a 33-acre lake in Grant County, Washington with a maximum depth of 25 feet.

Source: EPA Water Quality Portal sampling records, WA Ecology. Methodology: how these readings are compared.

What Thompson Lake is good for

From access and monitoring records, not editorial picks.

Camping4 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 Thompson Lake is safe to swim in today is a call for the Washington State Department of Ecology and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Thompson Lake

These are the measurements Washington Ecology publishes for Thompson 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 Thompson Lake

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

Lake Details

Max depth

25 ft

Surface area

33 acres

Shoreline

1 mi

Recreation & Access

Campgrounds

Public campgrounds near Thompson Lake

Steamboat Rock State Park Sage Loop Campground0.8 km
Steamboat Rock State Park Cove Loop Campground1.1 km
Steamboat Rock State Park Dune Loop Campground1.4 km
Steamboat Rock State Park Bay Loop Campground1.7 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 Thompson Lake

Compare lakeside cabins, hotels, and vacation rentals near Thompson Lake in Grant County, Washington — 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 Thompson Lake

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

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Follow Thompson Lake’s readings

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Fishing Thompson Lake

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

Nearby Lakes in Grant County

Osborn Bay Lake6.5 miView →Banks Lake19.4 ft clear · Oligotrophic7.9 miView →Coulee Lake—View →Dry Falls Lake—View →Trail Lake—View →Park Lake—View →

Frequently asked questions about Thompson Lake

Where is Thompson Lake?: Thompson Lake is a lake in Grant County, Washington. Its water-quality measurements are published by Washington Ecology and shown on this page as reported.
What is the water quality of Thompson Lake?: Thompson Lake in Grant County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Maximum depth: 25 ft. Surface area: 33 acres.
Is Thompson Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Thompson Lake?: Thompson Lake has a maximum depth of 25 feet. The lake covers 33 acres.
Are there campgrounds on Thompson Lake?: Thompson Lake has 4 public campgrounds from USGS The National Map within 5 km, including Steamboat Rock State Park Sage Loop Campground, Steamboat Rock State Park Cove Loop Campground, Steamboat Rock State Park Dune Loop Campground, Steamboat Rock State Park Bay Loop 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.