Facility · Wyoming ·
Managed by the USDA Forest Service
Jewel Cave National Monument (National Monument) · Open Access
From Custer, the Hell Canyon Trailhead is approximately 11 miles west on Highway 16. This trail is maintained for hikers, horseback riders and mountain bikers. No motorized use is allowed. The 1/2 of mile of trail climbs at a steep pace with one switchback until you top out on the limestone crest. This trail follows a bench below limestone cliffs and provides outstanding views of Hell Canyon and the surrounding area. The last 2 miles follows a two-track road along the bottom of Hell Canyon drainage.
43.73800, -103.84600 · 43°44'16.8"N 103°50'45.6"W
Typically 85°F in Jul, down to 36°F in Jan.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 36 | 37 | 47 | 55 | 65 | 76 | 85 | 84 | 74 | 59 | 45 | 36 |
| Low °F | 11 | 13 | 23 | 30 | 41 | 51 | 58 | 56 | 46 | 32 | 21 | 12 |
| Precip in | 0.4 | 0.6 | 0.8 | 1.7 | 2.9 | 3.3 | 2.9 | 1.7 | 1.2 | 1.2 | 0.5 | 0.5 |
1991–2020 averages from the nearest NOAA station, 8.6 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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