2018 Map of Thompson Peak

About this map

Summerville is situated along the high drainage of the S Fork Salmon River, where the Klamath National Forest and Trinity National Forest meet. This terrain is defined by the high elevations of the Trinity Alps and Salmon Mountains, featuring landmarks like Thompson Peak and Caesar Peak. The map documents a rugged landscape punctuated by glacial features, including Grizzly Lake, Moraine Lake, and Emerald Lake below the sharp crest of Sawtooth Ridge. Traces of human activity are concentrated in the north, including the Petersburg Water System and named tracts like Schoolhouse Flat. Numerous gulches such as Stage Gulch, Black Gulch, and Garden Gulch suggest a history of exploration and extraction near Yellow Jacket Basin. The boundary between Siskiyou and Trinity counties cuts through this high country, marking a transition between these protected forest lands.