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Dillon Field Office 

Dillon Field Office land status map--click for a larger image
The Dillon Field Office manages over 900,000 acres of public lands and approximately 1.3 million acres of mineral estate within Beaverhead and Madison Counties in the southwest corner of Montana.  Ranching and livestock grazing are important uses of the area. The wide open spaces provide excellent wildlife habitat and a wealth of dispersed recreation opportunities. 

The field office is home to BLM’s only designated wilderness area in Montana; the Bear Trap Canyon is one of the four units of the Lee Metcalf Wilderness. Here you will find opportunities for hiking, fishing, and world class white-water rafting on the Madison River. Drive the 50-mile Big Sheep Back Country Byway south of Dillon and watch for bighorn sheep, deer, elk and other wildlife. 

Big game hunting, hiking, fishing, camping, and wildlife viewing are popular activities within the Dillon Field Office and the nearby Beaverhead-Deerlodge National Forest. When you come to Montana, visit lands managed by the Dillon Field Office and enjoy America's public lands!


In The Spotlight

NEW!  Dillon Field Office to study conditions in South Tobacco Roots, Blacktail watersheds

BLM and other federal, state agencies balance recreation opportunities with habitat needs

Dillon BLM considers application for expanded outfitter use area

Dillon BLM to restore washed-out bridge across East Fork Blacktail Deer Creek

Axolotl Cabin reservations now open

For FY16, the Montana/Dakotas BLM will begin using ePlanning for tracking NEPA and Planning documents.  Please see the main ePlanning webpage for a listing of all NEPA and Planning projects in the Montana/Dakotas BLM beginning Oct. 1, 2015.

Watershed Assessment reports ready for public review:

Looking for more background information on the Tendoy Environmental Assessment on an Application for Permit to Drill?  Check out this BLM webpage!

Centennial Watershed Finding of No Significant Impact (FONSI)  ll  Cover Letter

Great Basin Record of Decision (ROD)

Idaho and Southwest Montana Approved Resource Management Plan Amendment

Pony Waste Rock Amendments EA  ll  FONSI  ll  Decision

Centennial Watershed EA  ll  Maps  ll  Executive Summary  ll  Letter from the Field Manager  ll  News Release

Rochester Abandoned Mine Lands EA  ll  Map  ll  News Release

Belmont Grazing Allotment EA  ll  Map 1  ll  Map 2  ll  Map 3  ll  Map 4  ll  News Release

BLM seeks public comment on proposed trail near Norris  ll  Map 1  ll  Map 2

Southwest Highlands EA  ll  Appendix B  ll  Appendix C  ll  Map 1  ll  Map 2  ll  Map 3  ll  Map 4  ll  Map 5  ll  Map 6  ll  News Release

Middle Ruby River Watershed EA  ll  Map 1  ll  Map 2  ll  Map 3  ll  Map 4  ll  Map 5  ll  Map 6  ll  Map 7  ll  Map 8  ll  News Release

Southwest Highlands Watershed Assessment  ll  Executive Summary  ll  Plants List  ll  Map 1  ll  Map 2  ll  Map 3  ll  Map 4

Middle Ruby Watershed Assessment Report          Map 1 ll Map 2 ll Map 3 ll Map 4

Historic Henneberry House available to rent for recreational use


Watershed Assessment Reports and Environmental Assessments

     Upper Horse Prairie
     Upper Big Hole     

     South Tobacco Roots
     Beaverhead West
     Red Rock/Lima
     East Bench
     Rochester Basin and North Tobacco Root
     East Pioneer
     Medicine Lodge
     East Grasshopper


Frequently Requested

Fire Restrictions | Fire Information

Recreation Opportunities


Dillon Interagency Dispatch Center 

Western Montana Resource Advisory Council


Dillon Field Office 1005 Selway Drive  |  Dillon, MT 59725-9431

Phone: 406-683-8000 |  Fax: 406-683-8066 |  Office hours: 7:45 a.m.- 4:30 p.m. M-F