California · Rock climbing · Twentynine Palms

The Fortress

The Fortress in California has 12 traditional climbing routes across 9 difficulty grades.

Photo: Joseph from Cabin On The Road, USA, CC BY-SA 2.0 (via Wikimedia Commons)

12 routes

5.9 – 5.11d

Trad

Is Fortress, 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 Oct 23, 8:30 pm PDT · Source: NPS · Joshua Tree National Park. Agencies don't list every closure — check before you go.

Best time to visit The Fortress

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° / 38°
4 wet
Feb
61° / 39°
3 wet
Mar
67° / 40°
3 wet
Apr
73° / 46°
2 wet
May
82° / 52°
1 wet
Jun
91° / 59°
0 wet
Jul
96° / 66°
2 wet
Aug
96° / 68°
2 wet
Sep
89° / 60°
2 wet
Oct
80° / 50°
1 wet
Nov
66° / 41°
2 wet
Dec
58° / 34°
4 wet

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Yucca Valley, CA, 14.5 mi away at 3,249 ft. The station sits about 1,200 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 Fortress is a climbing area in Joshua Tree National Park, California, within the Joshua Tree Wilderness. The National Park Service manages the land, and the area sits among several other named climbing spots that make this corner of the park a compact, close-together destination for climbers. The most comfortable months for a visit are spring and fall. Typical averages from a nearby weather station at Yucca Valley show April highs around 73°F with lows near 46°F, and October highs around 80°F with lows near 50°F. That station sits roughly 1,200 feet below the fortress, so temperatures at the crag run cooler. The climbing here is all trad, with 12 routes ranging from 5.9 to 5.11d. Grubstake Days is the easiest at 5.9, and Arms Control is the hardest at 5.11d. The Flying Fortress and Grey Giant are both within a quarter mile, and The Tombstone is about 0.3 miles away. For a change from the rock, the Willow Hole Trail is about 1.9 miles off, and the Barker Dam Trail is about 2.4 miles away.