2021 Map of Mumbo Basin

About this map

The Shasta National Forest dominates this high-elevation landscape within the Trinity Mountains, where the Pacific Crest National Scenic Trail winds along the eastern ridges. This 2021 survey documents a complex system of glaciated basins and steep drainages, including the prominent Mumbo Basin and its associated waters at Mumbo Lake and Upper Mumbo Lake. The topography is defined by sharp divides and named features like The Bedstead and Ramshorn Summit, reflecting a remote mountain environment with limited human infrastructure beyond these established trails. Numerous gulches such as Little Bear Gulch and Chrome Gulch feed into larger water systems like the E Fork Trinity River, highlighting the area's role as a critical watershed. The map captures the meeting of the Trinity and Siskiyou county lines near Gumboot Lake, providing a contemporary record of this wilderness area.