| Middle Sister | |
| Elevation Ft: | 10859 |
| Elevation Ref: | [1] |
| Prominence Ft: | 854 |
| Location: | Mono County, California, U.S. |
| Range: | Sweetwater Mountains |
| Map: | California |
| Map Size: | 220 |
| Coordinates: | 38.5079°N -119.2952°W |
| Coordinates Ref: | [2] |
| Topo: | USGS Desert Creek Peak |
| Easiest Route: | Scramble, |
Middle Sister is a mountain in the Sweetwater Mountains of Mono County, California, United States. It is located within the Humboldt-Toiyabe National Forest. The northeast ridge crosses into Lyon County in Nevada, making that location the Lyon County's highest point at about .[3] [4]