The Three Chimneys (Tuolumne County, California)The Three Chimneys is a mountain summit located in Tuolumne County, California, United States.DescriptionThe Three Chimneys is set on the boundary of the Emigrant Wilderness on land managed by Stanislaus National Forest. The landform is part of the Sierra Nevada mountain range and is situated four miles northwest of Granite Dome. Topographic relief is modest as the north aspect rises above Long Valley in. Precipitation runoff from this mountain drains into tributaries of the Stanislaus River. The landform's descriptive toponym has been officially adopted by the U.S. Board on Geographic Names.ClimateAccording to the Köppen climate classification system, Three Chimneys is located in an alpine climate zone. Most weather fronts originate in the Pacific Ocean, and travel east toward the Sierra Nevada mountains. As fronts approach, they are forced upward by the peaks, causing moisture in the form of rain or snowfall to drop onto the range.