Fishing on the Cossatot River.

Fishing provides many hours of enjoyment at Gillham Lake. The species most actively sought are smallmouth, largemouth, and spotted bass, crappie, channel and flathead catfish, and various species of sunfish. In addition, white bass and walleye have been introduced in an effort to provide an improved fishery. Most of the species found in the lake are also present in the downstream areas.