Many rangeland areas within the Bureau of Land Management (BLM) Richfield (Utah) Field Office were severely overgrazed by uncontrolled livestock during the late 1800s. This resulted in a loss of cool-season grasses and perennial forbs and a conversion to highly palatable, young, productive big sagebrush (Artemisia tridentata Nutt.). The conversion to big sagebrush created beneficial habitat for species such as the mule deer (Odocoileus hemionus), greater sage-grouse (Centrocercus urophasianus), and pygmy rabbit (Brachylagus idahoensis [Merriam, 1891]) and resulted in an increase in their populations during the early and mid-1900s. Many of these rangeland areas now consist of a monoculture of old, decadent, big sagebrush (80 to 100 years old), which is less desirable for sagebrush–steppe species. Desirable perennial grasses and forbs are still absent from the rangeland, resulting in minimal vegetative diversity. The rangeland needs active management to become productive and diverse in its vegetation and wildlife.