The Lemhi Range is a rugged mountain range spanning northeastern Idaho and west-central Montana, known for **alpine peaks**, **high alpine passes**, and **sagebrush valleys**.
Geography
| Continent | North America |
|---|---|
| Region | Northern Rockies |
| Subregion | Northern Rockies / Great Basin transition |
| Country | United States |
| State | IdahoMontana |
| County | Lewis and Clark County (ID)Beaverhead County (MT) |
| District | Lemhi County |
| Timezone | AmericaBoise |
| Latitude | 45.6 |
| Longitude | -113.5 |
| Maps |
The Lemhi Range forms a rugged barrier across northwestern Montana and south-central Idaho, separating the Salmon River basin to the west from the Big Hole and Missouri drainages to the east. At its core are **sharp alpine peaks** exceeding 3,600 meters (12,000 ft)**, accessible via high-country passes and cross-range routes. Valley floors downstream are dominated by **sagebrush steppe** and small agricultural communities, while forests of **subalpine fir**, **whitebark pine**, and **deciduous riparian trees** rise toward the range's ridgelines.
All content was written by our AI and may contain a few mistakes. We may earn commissions on some links. Last updated: Sun Dec 14, 2025, 2:55 AM
