U.S. DEPARTMENT OF THE INTERIORBUREAU OF LAND MANAGEMENT
|Lander Field Office|
Named for the green timber which covers it, Green Mountain and its neighbors, Crooks Mountain to the west and Whiskey Peak to the east, comprise a small mountain range by Rocky Mountain standards. Green Mountain has no hard rock core but was formed from sediments eroded from the much older Granite Mountains just to the north. Crooks Mountain and its adjacent Crooks Gap and Crooks Peak were named after Civil War veteran and Indian fighter General George H. Crook.
Green Mountain has a long history of mineral and other resource production. Wyoming's first uranium mill was established in the area in the 1950s. During the uranium boom of the late 1970s, Jeffrey City had over 4,000 residents, or 20 times its present population. Timber harvesting and oil exploration and production, along with livestock grazing, remain important economic activities.
All BLM offices in Wyoming have 1:100,000-scale land ownership status/topographic maps available for $4.00 each. The Bairoil map covers the Green Mountain area.