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Thompson Seep South
Photo of Thompson Seep South

The Thompson Seeps are located approximately 11.5 miles southwest of Othello, Washington in Franklin County. Thompson Seep South has a mean depth 6 feet and a maximum depth of 14 feet, and is approximately 25 acres in size. Lake is fed from groundwater and run-off flow from the Wahluke Branch Ten Wasteway.

South Thompson Seeps is owned by the United States Bureau of Reclamation but is managed by the Washington Department of Fish and Wildlife. Primitive roads, consisting mostly of sand and gravel, lead to the lake. 

Thompson Seep South provides anglers two primitive boat launch areas, both located on the west shoreline.

Species you might catch

Black crappie
Bluegill
Largemouth bass
Pumpkinseed
Yellow bullhead
Yellow perch

Lake Information

Franklin County
Lake Acreage: 58.2
Elevation: 793 feet
Eastside Washington

Lake Management Type
Warmwater emphasis

Sport Fishing Regulations & Seasons

Emergency Rule Updates
Fishing closures and openings happen constantly throughout the year. The E-Rules keep you up-to-date.


Locate Locate this lake
This feature shows the general location of the selected body of water. Directions may not include routes to boat launches or other water access sites. Check below for access sites or read the description for specific access information. Please do not trespass on private property.
Two-Pole Fishing Allowed

Access Sites / Boat Ramps on this Lake

No site or ramp information available.

Fish Plants & Stocking Reports