Wild Horse and Burro Freezemarks

The following graph illustrates how to read a freeze mark. If a mark is difficult to read, we recommend shaving the left side of the neck. You must know the freeze mark of your horse or burro before you make an inquiry to a BLM office.

BLM Freezemark
Arizona
80001-160000
California
160001-240000
Colorado
240001-320000
Idaho
320001-400000
Montana
400001-480000
Nevada
480001-640000
New Mexico
640001-720000
Oregon
0-80000
Utah
720001-800000
Wyoming
800001-880000
Eastern States
880001-880100


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