The Underground
Underground, The is a bouldering area in California with 2 routes.
- 2 routes
- V0 – V2+
- Bouldering
Is Underground, The open right now?
Alert in the area
The National Park Service lists 3 alerts for Joshua Tree National Park.
Partial Trail Closure of West Side Loop
Park alert covering Joshua Tree National Park · NPS · Joshua Tree National Park
Inaccurate Third-Party Apps
Park alert covering Joshua Tree National Park · NPS · Joshua Tree National Park
Oasis of Mara Trail Partial Closure
Park alert covering Joshua Tree National Park · NPS · Joshua Tree National Park
As of · Source: NPS · Joshua Tree National Park. Agencies don't list every closure — check before you go.
Best time to visit The Underground
Best months: October–May. Best months have typical highs of 55–85 °F, lows of 30 °F or warmer (32 °F where the station doesn't record snow), at most one snowy day and no more than 12 wet days.
Jan
58° / 42°
Feb
61° / 42°
Mar
68° / 44°
Apr
73° / 49°
May
82° / 55°
Jun
92° / 63°
Jul
96° / 70°
Aug
96° / 70°
Sep
89° / 64°
Oct
80° / 55°
Nov
66° / 45°
Dec
58° / 38°
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Yucca Mesa, CA, 20.4 mi away at 3,445 ft. The station sits about 1,600 ft lower than this place, so expect it a little cooler here. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
The Underground is a bouldering area in Joshua Tree National Park, within the Joshua Tree Wilderness in California, on land managed by the National Park Service. The closest named climbing areas are Walt's Rocks, about 0.1 mile away, and Olympic Dome, about 0.3 mile away. The climbing here is bouldering only, with two routes on the V0 to V2+ scale. "The Swallow's Tail" is a V0 boulder problem, and "The Heart" is a V2+ boulder problem. Spring and fall are the most comfortable times to visit. Typical averages from a nearby weather station at Yucca Mesa put April highs around 73°F and October highs around 80°F. That station sits about 1,600 feet lower than this area, so temperatures in the bouldering area run cooler. A fee is charged for the visit.
Routes (2)
Heart of the Universe(2)
Facts about this crag
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