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thumb|upright=1.2|Emigrant Wilderness outline map
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The Emigrant Wilderness of Stanislaus National Forest is a formally designated wilderness area in the Sierra Nevada. It is bordered by Yosemite National Park on the south, the Toiyabe National Forest and the Hoover Wilderness on the east, and State Route 108 over Sonora Pass on the north. It is an elongated area that extends northeast about in length and up to in width. Watersheds drain to the Stanislaus and Tuolumne Rivers. The Emigrant Wilderness area, which is a glaciated landscape, is entirely within Tuolumne County, California and is approximately east of San Francisco, California and south of Lake Tahoe.
The northeastern third of the Wilderness is dominated by volcanic ridges and peaks; the remaining areas consist of many sparsely vegetated, granitic ridges interspersed with numerous lakes and meadows. Elevations range from below near Cherry Reservoir to at Leavitt Peak, but the elevation range of most of the popular areas is . Precipitation averages annually, 80% of it in the form of snow. Snowpacks typically linger into June, sometimes later following very wet winters. Summers are generally dry and mild, but afternoon thundershowers occur periodically and nighttime temperatures could dip below freezing anytime.