California · Rock climbing · Mammoth Lakes

Lake Boulder

Lake Boulder in California has 9 bouldering routes across 6 grades.

9 routes
V0 – V4
Bouldering

Is Lake Boulder 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 Lake Boulder

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, 4.6 mi away at 7,804 ft. The station sits about 1,500 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.

Lake Boulder is a bouldering area in the Mammoth Ranger District of Inyo National Forest in California, managed by the Forest Service. It sits among a cluster of climbing and riding spots, with T J Lake and T J Slabs both about 0.1 mile away and the Tj Lake Loop mountain biking route about 0.2 mile off. The climbing here is all bouldering, with nine routes spread across the area. Grades run from V0 to V4, and the hardest of them is Problem F SDS at V4. The easiest are Problem C and Problem F, both V0. Lake View is a V3. 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 stay around 41°F. That station sits about 1,500 feet lower than the boulders, so temperatures at the climbing area run cooler. Lake George Campground and Coldwater Campground are both about 0.8 mile away. The Coldwater Campground to Lake George hike starts about 0.6 mile off, and Mammoth Creek, a paddling spot, is about 3.3 miles away.

Routes (9)

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T J LakePhoto: mjhbower, CC BY-SA 2.0 (via Flickr)

T J Lake

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T J SlabsPhoto: inkknife_2000 (14 million views), CC BY-SA 2.0 (via Flickr)

T J Slabs

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Huggy Bear AreaPhoto: Jane S. Richardson (talk · contribs), CC BY-SA 3.0 (via Wikimedia Commons)

Huggy Bear Area

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Spring Wall

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Sister BoulderPhoto: inkknife_2000 (14 million views), CC BY-SA 2.0 (via Flickr)

Sister Boulder

~2 min drive

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Ugly Duckling AreaPhoto: Jane S. Richardson (talk · contribs), CC BY-SA 3.0 (via Wikimedia Commons)

Ugly Duckling Area

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Seam AreaPhoto: Jane S. Richardson (talk · contribs), CC BY-SA 3.0 (via Wikimedia Commons)

Seam Area

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Horseshoe Slabs BoulderPhoto: inkknife_2000 (7.5 million views +), CC BY-SA 2.0 (via Wikimedia Commons)

Horseshoe Slabs Boulder

~2 min drive

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Horseshoe SlabsPhoto: inkknife_2000 (14 million views), CC BY-SA 2.0 (via Flickr)

Horseshoe Slabs

~2 min drive

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Labor WallPhoto: mjhbower, CC BY-SA 2.0 (via Flickr)

Labor Wall

~3 min drive

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