THE LEMHI COUNTY LAND BRIEF
Land in the
Southern Forested Mountains setting.
Lemhi County has 4,563.7 square miles of land in Idaho. 10 mapped landscape regions meet across Lemhi County: Southern Forested Mountains, Dry Gneissic-Schistose-Volcanic Hills, Barren Mountains, among others.
A deeply cut mountainous plateau forms the Idaho Batholith. Granitic terrain supports conifer forests, while deep canyons introduce warmer settings with pine, shrubs and grasses.
Regional context: Idaho Batholith ↗ · Regional mapping across the county footprint
Where the landscape changes
Lemhi County intersects 10 mapped regional units. The largest mapped shares are:
- Southern Forested Mountains28.3%
- Dry Gneissic-Schistose-Volcanic Hills15.5%
- Barren Mountains14.7%
- Dry Intermontane Sagebrush Valleys13.5%
- South Clearwater Forested Mountains9.5%
Middle Rockies in Lemhi County
Forested mountain ranges rise above grassy or shrubby intermountain valleys. The Middle Rockies combine alpine high country, partly wooded foothills and valleys supplied by mountain streams.
Read the regional source ↗Finding your parcel within Lemhi County
The atlas lists 2 cities, towns, townships, and Census communities associated with Lemhi County, including Salmon, Leadore. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Lemhi County by land and water
The Census records 5.44 square miles of water within Lemhi County, or 0.1% of its total area. That share is close to Lemhi County’s 0.1%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Lemhi County has 1,818.9 times the land area of nearby Salmon city (2.51 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Butte County, Clark County, Custer County, Idaho County, Valley County within Idaho. A tract near one of these lines should be matched to the county identifier on its own records.

