WY Mule Deer Unit 21 — Thunder Basin

WY 21 – Thunder Basin. Terrain & Access WY 21 spans 545,186 acres across rolling to moderate elevation (4,142–5,169 ft), with only 18% public land. The majority of huntable terrain is private—a critical constraint for DIY hunters. Access is limited; plan on scouting heavily beforehand or securing permission well in advance. The unit's lower-elevation character and private-land dominance make it fundamentally a permission-based hunt rather than a public-land opportunity. Herd Quality Recent wildlife surveys show an above-average buck:doe ratio of 33:100, indicating a well-balanced deer herd with good representation of mature males. This ratio suggests reasonable opportunity..