Facility · Wyoming ·
Managed by the Bureau of Land Management
Lander Field Office (Bureau of Land Management WY) · Open Access

The best access route to Green Mountain is Green Mountain Road (BLM Road 2411), an improved gravel road which intersects U.S. Highway 287 about six miles east of Jeffrey City.
42.34444, -107.73279 · 42°20'40.0"N 107°43'58.1"W
Typically 85°F in Jul, down to 31°F in Jan.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 31 | 34 | 45 | 54 | 64 | 76 | 85 | 83 | 73 | 58 | 42 | 31 |
| Low °F | 9 | 11 | 20 | 26 | 35 | 43 | 50 | 48 | 39 | 29 | 18 | 10 |
| Precip in | 0.3 | 0.5 | 0.8 | 1.4 | 2.0 | 1.0 | 0.7 | 0.5 | 0.8 | 0.9 | 0.5 | 0.5 |
1991–2020 averages from the nearest NOAA station, 11.5 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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