| Lassen National Forest | |
|---|---|
 Echo Lake in Lassen National Forest | |
  Map of the United States | |
| Nearest city | Susanville, California |
| Coordinates | 40°30′01″N 121°00′01″W / 40.50028°N 121.00028°W |
| Area | 1,070,344 acres (4,331.53 km2) |
| Established | June 2, 1905 |
| Governing body | U.S. Forest Service |
| Website | Lassen National Forest |
Lassen National Forest is a United States national forest of 1,700 square miles (4,300 km2) in northeastern California. It is named after pioneer Peter Lassen, who mined, ranched and promoted the area to emigrant parties in the 1850s.