California · Rock climbing · Twentynine Palms

Isles Corridor - Left Side

Isles Corridor - Left Side in California has 9 traditional climbing routes across 8 grades.

Photo: daveynin, CC BY 2.0 (via Flickr)

9 routes

5.2 – 5.11b

Trad

Is Isles Corridor - Left Side 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 24, 6:30 pm PDT · Source: NPS · Joshua Tree National Park. Agencies don't list every closure — check before you go.

Best time to visit Isles Corridor - Left Side

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, 20.7 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.

Isles Corridor - Left Side is a climbing area in California's Joshua Tree National Park, within the Joshua Tree Wilderness. The National Park Service manages the land, and the area sits among several other named climbing spots, including Isles Corridor, Isles in the Sky and its faces, all within about a tenth of a mile. The climbing here is all trad, with nine routes ranging from 5.2 to 5.11b. Descent Crack is the easiest at 5.2, and Heavy Mettle is the hardest at 5.11b. Dreamworld, at 5.10b, and Grounder, at 5.9, are among the more established options. Spring and fall are the most comfortable times to visit. Typical averages from a nearby weather station in Yucca Valley show April highs around 73°F and October highs around 80°F, while July and August average about 96°F. That station sits roughly 1,200 feet lower than the area, so temperatures on the rock run cooler. Split Rock Trail is about 0.4 miles away, and Skull Rock Nature Trail is about 0.8 miles away. For an overnight stay, Sheep Pass Group campground is about 3.4 miles off.