Campground · Wyoming ·
Managed by the Bureau of Land Management
Rawlins Field Office (Bureau of Land Management WY) · Open Access
The Prior Flat Campground has 15 campsites and a vault toilet on about 9 acres. It has one pull-through, picnic tables, fire rings/grills and parking spurs.
Typical use season is from June 1st through November 15th because the roads become impassable after heavy rain and snow melt. No horses allowed in campground.
The campground is located at the foot of the Shirley Mountains, a remote range in a large basin between the Medicine Bow and the Ferris Mountains.
Visitors will enjoy the aspen, limber pine, lodgepole pine, big sagebrush and can view pronghorn, mule deer, elk, coyotes, grouse and golden eagles.
From Medicine Bow, take Wyo 487 north approximately 21 miles and turn left onto Wyo 77. Follow Wyo 77 about 9 miles and take County Road 102 west for about 9 miles to the Shirley Mountain Loop Road (BLM Road 3115). Campground is just up the hill about 1/4 mile.
42.24194, -106.58625 · 42°14'31.0"N 106°35'10.5"W
Typically 89°F in Jul, down to 35°F in Dec.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 36 | 38 | 49 | 58 | 69 | 81 | 89 | 87 | 76 | 61 | 47 | 35 |
| Low °F | 14 | 14 | 23 | 29 | 37 | 45 | 52 | 50 | 42 | 32 | 24 | 16 |
| Precip in | 0.5 | 0.7 | 0.8 | 1.4 | 1.9 | 0.9 | 0.8 | 0.6 | 0.8 | 1.2 | 0.7 | 0.8 |
1991–2020 averages from the nearest NOAA station, 14.2 mi away — not measured at the facility itself, and elevation can make a real difference over that distance.
Recreation.gov last updated this record on 2026-02-25.
Facility information and photographs from Recreation.gov (RIDB). SpotOpened is not affiliated with Recreation.gov or any federal agency.
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