| Diamond Mountains | |
| Country: | United States |
| State: | California |
| Region: | northern Sierra Crest |
| District Type: | County |
| District: | Plumas County |
| Topo Map: | Janesville |
| Topo Maker: | USGS |
| Range: | Sierra Nevada (U.S.) |
| Border: | SW of Honey Lake Valley[1] |
| Elevation Ft: | 8199 |
| Elevation Ref: | http://www.mountainzone.com/mountains/detail.asp?fid=745545 |
| Geology: | Granitic |
| Access: | Diamond Mountain Trail |
| Map: | USA California |
| Map Relief: | yes |
| Map Size: | 220 |
| Range Coordinates: | 40.2613°N -120.5574°W |
| Range Coordinates Ref: | [2] |
The Diamond Mountains is a mountain range in Lassen and Plumas counties, California, one of the northeasternmost portions of the Sierra Nevada.[3]