The Bureau of Land Management administers more than 17.5 million acres of public lands and 40.7 million acres of federal mineral estate in Wyoming out of its state, district and field offices. The state office is located at 5353 Yellowstone Road in Cheyenne. Office hours are 7:45a.m. - 4:30p.m. Monday through Friday.
See http://www.blm.gov/wy/st/en/info/offices.html for locations and hours of the district and field offices.