In Wyoming, all wild American Mustangs are managed by the Bureau of Land Management, on almost 5 million acres of land, in 16 Herd Management Areas (HMAs).
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The total Appropriate Management Level (AML) of horses in the state of Wyoming is 3725 horses, not including foals under one year in age.
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The list below includes a link to the BLM webpage for each HMA, giving an overview of specifics and contact information to the managing office.
The North Lander HMA Complex is comprised of Conant Creek, Dishpan Butte, Muskrat Basin, and Rock Creek HMAs which are shown individually on the map.
The North Lander HMA Complex is comprised of Conant Creek, Dishpan Butte, Muskrat Basin, and Rock Creek HMAs which are shown individually on the map.
WYOMING BLM HMA list
Adobetown HMA, Rawlins Field Office, High Desert District. AML is 610-800.
Antelope Hills HMA, Lander Field Office, Wind River Bighorn Basin District. AML is 60-82.
Crooks Mountain HMA, Lander Field Office, Wind River Bighorn Basin District. AML is 65-85.
Divide Basin HMA, Rock Springs Field Office, High Desert District. AML is 415-600.
Fifteenmile HMA, Worland Field Office, Wind River Bighorn Basin District. AML is 100-230.
Green Mountain HMA, Lander Field Office, Wind River Bighorn Basin District. AML is 170-300.
Little Colorado HMA, Rock Springs Field Office, High Desert District. AML is 69-100.
Lost Creek HMA, Rawlins Field Office, High Desert District. The AML is 60-82.
McCullough Peaks HMA, Cody Field Office, Wind River Bighorn Basin District. AML is 70-140.
North Lander HMA Complex, Lander Field Office, Wind River Bighorn Basin District. AML is 320-536.
Salt Wells Creek HMA, Rock Springs Field Office, High Desert District. AML is 251-365.
Stewart Creek HMA, Rawlins Field Office, High Desert District. The AML is 125-175.
White Mountain HMA, Rock Springs Field Office, High Desert District. AML is 205-300.