California · Rock climbing · Descanso

Library Boulder

Library Boulder in California has 10 bouldering routes across 7 grades.

10 routes
V0-1 – V4-5
Bouldering

Is Library Boulder open right now?

Closure in the area

There's a closure order in Cleveland National Forest. It doesn't name Library Boulder, so check the source for the area it covers.

As of · Source: USFS · Cleveland National Forest. Agencies don't list every closure — check before you go.

Best time to visit Library Boulder

Best months: March–November. 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.

  1. Jan

    51° / 33°

    7 wet

  2. Feb

    51° / 33°

    8 wet

  3. Mar

    55° / 36°

    7 wet

  4. Apr

    60° / 39°

    5 wet

  5. May

    67° / 44°

    3 wet

  6. Jun

    76° / 51°

    1 wet

  7. Jul

    83° / 58°

    1 wet

  8. Aug

    84° / 58°

    2 wet

  9. Sep

    79° / 51°

    2 wet

  10. Oct

    69° / 42°

    3 wet

  11. Nov

    59° / 35°

    5 wet

  12. Dec

    51° / 32°

    7 wet

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Cuyamaca, CA, 10.6 mi away at 4,640 ft. The station sits about 1,200 ft higher than this place, so expect it a little warmer here. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

Library Boulder is a climbing area in the Descanso Ranger District of Cleveland National Forest in California, managed by the Forest Service. It sits among a cluster of bouldering spots, with Vasa Boulder, Dos Equis Boulder and Descanso Boulders all about 0.1 mile away. Spring and fall are the most comfortable times to visit. Typical averages from a nearby weather station in Cuyamaca show May highs around 67°F and October highs around 69°F, while July and August average in the low 80s. That station sits about 1,200 feet lower than the boulders, so temperatures up here run cooler. The Climbers Approach Trail starts about 0.3 mile away. For a longer outing, the Dead Horse Trail is about 2.4 miles off. Paddlers can reach the Sweetwater River, about 8 miles away, and Corral Canyon Campground is roughly 10 miles away.

Routes (10)