Wyoming Hunt Area 21 (Thunder Basin) deer hunting
Hunt area 21 stretches across rolling sagebrush and grassland broken by ponderosa pine scattered across gentle slopes, covering about 852 square miles at elevations between 4,100 and 5,200 feet. The country is predominantly sagebrush at 53% of the land cover, with grass and meadow at 37%, making it open and walkable but sparsely treed. Slope angles average 3.5 degrees across the area, with 93% of the ground gentle and 6% moderate, so topography is not a limiting factor for foot traffic — the real obstacle to hunting is access to land.
Public ground amounts to about 19% of the hunt area, concentrated on State Trust Land, BLM, and National Forest ground that fronts county roads and state highways. Much mapped public land is not actually reachable, and what is accessible draws high hunter density early in the season. White-tailed deer are found almost entirely on private land, while mule deer use both public and private ground. Private holdings make up 81% of the area, and many ranches are leased to outfitters. Obtaining access requires either prior arrangement or a trespass fee, and finding private land that accepts new hunters is difficult. Walk-in areas in Campbell County offer some entry for those who can scout them, but they turn over year to year and carry no guarantee of remaining open.
Hunting pressure is heaviest in the first week of the season as hunters concentrate on accessible public land. Choosing to hunt later in September and into October shifts hunters into periods of noticeably lighter competition. The seasons split between early-fall hunting for antlered mule deer or any white-tailed deer, a November-only white-tailed season, and a September–October doe or fawn white-tailed hunt valid only on private land.
Licence and how this hunt area is drawn
Hunt Area 21 (Thunder Basin) is a general-licence hunt area, and how a hunter gets a licence for it depends on where they live.
- A Wyoming resident buys a general deer licence over the counter — unlimited statewide, on sale from mid-July. No draw, no application, no preference points.
- A nonresident cannot buy one. They must draw a Region general licence — for this hunt area, deer region B, which is valid across the general-licence hunt areas of that region and nowhere else.
A hunter may hold only ONE general deer licence in a year, so a general licence is a single choice rather than something to stack.
Wyoming residents have no preference points for deer — the resident deer draw is random, and no resident point cutoff exists for any hunt area in the state. For nonresidents points matter a great deal: Wyoming awards 75% of each nonresident pool through the preference-point draw, top-down by points, and the remaining 25% at random. Nonresidents also choose between the Regular and Special pools — the same hunts at two price points, competing separately.
Seasons (2026)
- Type Gen — general licence · Antlered mule deer or any white-tailed deerLegal: mule deer and white-tailed deer, under different rulesArchery September 1 – September 30Regular October 1 – October 15
- Type Gen — general licence · Any white-tailed deerLegal: white-tailed deer onlyRegular November 1 – November 15
- Type 8 · Doe or fawn white-tailed deer valid on private landLegal: white-tailed deer onlyArchery September 1 – September 30Regular October 1 – October 31
The wording of each hunt is the Wyoming Game & Fish Department’s and is legally exact — a “doe or fawn” hunt is not a deer hunt in general, and a hunt limited to part of the area is not valid across it. Confirm every hunt in the current regulations before applying.
Hunting each season
Type Gen — Antlered mule deer or any… · mule deer & whitetail (September–October)
Hunting the early-fall archery and regular seasons for antlered mule deer or any white-tailed deer spans September through mid-October, when bucks are shedding velvet and moving into fall migration and early staging behavior. Early September brings warm days with highs near 74 degrees and cool nights, little snow, and the densest hunter concentrations on accessible public land; by mid-October, daytime highs drop toward 58 degrees and light snow becomes possible. Accessible public ground near roads and highways draws the bulk of this pressure, particularly in the first week of the season, with easing competition as the season progresses. Antlered mule deer occur on both public and private land, while white-tailed deer remain tied almost entirely to private land, making private-land access or walk-in entry essential for hunters targeting white-tails.
Type Gen — Any white-tailed deer · whitetail only (November)
November's white-tailed-only season offers a quieter hunt for those with private land access secured, when bucks are active in pre-rut and peak rut phases and weather has shifted sharply cooler with highs dropping to around 45 degrees and snowfall averaging 2.5 inches for the month. At this point, early-season public-land pressure has largely passed, and the concentration of white-tailed deer on private holdings creates an opportunity for hunters who have arranged access beforehand. Few hunters pursue this season compared to the early fall, making it a less crowded choice.
Type 8 — Doe or fawn white-tailed deer valid… · whitetail only (September–October)
The doe or fawn white-tailed hunt in archery and regular windows from September through October is valid only on private land, offering a distinct option for hunters with landowner permission and targeting antlerless white-tailed deer as velvet shedding and early migration unfold. Weather starts warm in early September and cools steadily through October as snowfall increases. This hunt carries light pressure because few hunters target it, and the restriction to private land means access remains the limiting factor.
Land and access
About 19% of this hunt area is ground a hunter can generally count on — State Trust Land, BLM and National Forest, roughly 159 square miles. Public ownership is not the same as easy entry: roads, trailheads, seasonal closures and private inholdings all still apply.
State trust land counts toward the open figure above. Wyoming extends hunting on legally accessiblestate trust land to the public unless a parcel is specifically closed — the catch is the access itself, since crossing private ground to reach it still needs the landowner’s permission. Camping, fires and off-road vehicles are not allowed on it.
This hunt area has 2 enrolled walk-in areas. That is private ground enrolled for public access, not public land. A Walk-In Area needs no permission slip — a hunter may walk in during the open period, subject to its posted rules. Enrollment is renegotiated every year, so check current status before counting on either.
Where deer are mapped
Each figure is the share of the hunt area that layer covers. It says where deer are mapped, not where inside the area they are, and not when they move.
Habitat and cover
Across the unit
Shares are of each elevation band, not of the whole hunt area — they describe what grows up there, not how much of the area sits at that elevation.
Weather through the season
| Month | Avg high | Avg low | Snowfall |
|---|---|---|---|
| January | 35°F | 12°F | 2.9 in |
| February | 37°F | 14°F | 3.7 in |
| March | 47°F | 22°F | 2.7 in |
| April | 55°F | 30°F | 1.9 in |
| May | 65°F | 39°F | 0 in |
| June | 77°F | 48°F | 0 in |
| July | 86°F | 55°F | 0 in |
| August | 85°F | 54°F | 0 in |
| September | 74°F | 44°F | 0 in |
| October | 58°F | 32°F | 0.8 in |
| November | 45°F | 21°F | 2.5 in |
| December | 35°F | 13°F | 3.5 in |
Snowfall is the monthly total, not depth lying on the ground.
Common questions
- Can a hunter use a general Wyoming deer licence on this hunt area?
- Yes. Hunt area 21 is a general-licence area. A Wyoming resident purchases a general deer licence over the counter with no draw and no preference points involved. A nonresident must draw a Region B general licence, which is valid across all general-licence hunt areas in that region, including this one.
- Which deer species can a hunter legally take in the main September–October season here?
- The Type Gen hunt in September and October permits antlered mule deer or any white-tailed deer. The antler requirement applies to mule deer only; any white-tailed deer, including does and fawns, are legal. White-tailed deer in this hunt area are found almost exclusively on private land.
- Does a nonresident need preference points to draw a general licence for this area?
- Preference points matter significantly for nonresidents. Three quarters of the general licences go to the preference-point draw, awarded top-down by points accumulated in prior years, and a quarter go to a random draw that everyone enters. A nonresident with no points can draw the random quarter, but points substantially improve odds in the preference pool.
- How much of this hunt area can a hunter actually access on public land?
- About 19% of the area is public land — State Trust Land, BLM, and National Forest — but much of it shown on maps is not reachable due to road closures, lack of trailheads, and private inholdings. Accessible ground fronts county roads and state highways and receives heavy early-season pressure. Campbell County Walk-In Area 6 and Campbell County Walk-In Area 3 offer seasonal entry for those who scout them, though enrollment changes year to year.
- When is hunting pressure lighter on this area?
- Pressure peaks during the first week of the season as hunters concentrate on accessible public land. Hunters who hunt later in September and into October see substantially less competition. A November-only white-tailed season offers another option for those with private-land access, and very few hunters pursue the doe or fawn white-tailed hunt in October.
Sources
- Wyoming Game & Fish — Hunting & Trapping — licence types, general and limited-quota hunts, and season structure
- WGFD Hunt Planner — hunt-area boundaries, season dates and the unit descriptions
- WGFD — Draw results and odds — how the resident random draw and the nonresident preference-point draw work
- WGFD — Regulations — the legal limitations on each hunt, and the statewide licence rules
- USGS National Land Cover Database (NLCD 2021) and 3DEP elevation — land cover and terrain by elevation band
Seasons, licence types and boundaries change. Confirm every detail with the Wyoming Game & Fish Department before applying or hunting.