The headwaters of Mammoth Creek are in Mammoth Lakes Basin above the town of Mammoth Lakes. The creek is fed by runoff. Mammoth Creek runs approximately 8 miles before reaching the confluence with Hot Creek, which then flows into the Upper Owens River.
The approximately 3.5 mile Hot Creek is fed by run off along with coldwater and geothermal springs. Mammoth and Hot Creek are host to rainbow and brown trout. Water quality, minimum flows and non-point source pollution are issues affecting these creeks.
Opportunities exist for enhancing fisheries condition via restoration, and identifying non-point source pollution to improve water quality. California Trout is working with the Mammoth Community Water District and the CA DFG to promote water conservation, resources stewardship and sustainable water allocations in the Mammoth Basin.