Not far from the Tioga Pass entrance station to Yosemite National Park lie the remains of the Hess Mine, one of the more accessible 1940s-era tungsten mines in the High Sierra. Three widely-separated claims comprised the mine: the main claim at the north end of Steelhead Lake; a small middle claim above the west shore of Wasco Lake; and an even smaller claim on the large ridge just west of Saddlebag Lake. Steelhead and Wasco Lakes are nestled in the Twenty Lakes Basin, a beautiful high-elevation bowl surrounded by 12,000-foot peaks, just outside the eastern Yosemite boundary. The Hess Mine produced only limited quantities of low-grade tungsten ore, eventually closing in the early 1960s.