California · Rock climbing · Mammoth Lakes

Thimble Boulders

Thimble Boulders in California offers 7 bouldering routes across 3 difficulty grades.

7 routes
V0 – V3
Bouldering

Is Thimble Boulders open right now?

Alert in the area

The Forest Service lists 4 alerts for Inyo National Forest.

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

Best time to visit Thimble Boulders

Best months: May–September. 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

    41° / 17°

  2. Feb

    41° / 18°

  3. Mar

    45° / 22°

  4. Apr

    51° / 27°

  5. May

    60° / 35°

  6. Jun

    70° / 42°

  7. Jul

    78° / 49°

  8. Aug

    77° / 47°

  9. Sep

    71° / 40°

  10. Oct

    61° / 30°

  11. Nov

    49° / 23°

  12. Dec

    41° / 17°

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Mammoth Lakes Rs, CA, 19.3 mi away at 7,804 ft. The station sits about 700 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.

Thimble Boulders is a climbing area in the White Mountain Ranger District of Inyo National Forest, about 19 miles from Mammoth Lakes. The land is managed as city land. Summer is the most comfortable time to visit. Typical averages from a nearby weather station at Mammoth Lakes show July highs around 78°F with lows near 49°F, while winter highs sit around 41°F with lows in the teens. Several other climbing areas sit right next door, including Dreamers, The, Mondo Boulder and Walling Boulders, each about 0.1 mile away. For an overnight stay, Tuff Campground is about 2 miles off.

Routes (7)