Garfield counties. There are local ranger district offices located in Steamboat Springs, Walden, and Yampa. Thunder Basin National Grassland (547,620 acres) is located in northeastern Wyoming and consists primarily of lands leased to cattle interests. In descending order of land area the grassland is located in Weston, Converse, Campbell, Niobrara, and Crook counties. There are local ranger district offices located in Douglas. The forest headquarters is in Laramie, Wyoming. References Further reading External links National Forests of Colorado National Forests of Wyoming National Forests of the Rocky Mountains Protected areas established in 1902 Protected areas of Carbon County, Wyoming Protected areas of Albany County, Wyoming Protected areas of Converse County, Wyoming Protected areas of Natrona County, Wyoming Protected areas of Platte County, Wyoming Protected areas of Weston County, Wyoming Protected areas of Campbell County, Wyoming Protected areas of Niobrara County, Wyoming Protected areas of Crook County, Wyoming Protected areas of Routt County, Colorado Protected areas of Jackson County, Colorado Protected areas of Rio Blanco County, Colorado Protected areas of Grand County, Colorado Protected areas of Moffat County, Colorado Protected areas of Garfield County, Colorado 1902 establishments in Wyoming 1905 establishments in Colorado Protected areas established in 1905