California · Rock climbing · Groveland

J.B.'s Boulder

J.B.'s Boulder in California has 6 bouldering routes across 6 difficulty grades.

6 routes
V0 – V5
Bouldering

Is J.B.'s Boulder open right now?

No closures listed

The National Park Service lists no closures for Yosemite National Park.

As of · Source: NPS · Yosemite National Park. Agencies don't list every closure — check before you go.

Best time to visit J.B.'s Boulder

Best months: June–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° / 13°

  2. Feb

    38° / 12°

  3. Mar

    42° / 15°

  4. Apr

    45° / 22°

  5. May

    54° / 27°

  6. Jun

    65° / 33°

  7. Jul

    71° / 38°

  8. Aug

    70° / 36°

  9. Sep

    65° / 32°

  10. Oct

    57° / 26°

  11. Nov

    47° / 20°

  12. Dec

    40° / 12°

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Tuolumne Meadows Rs, CA, 0.2 mi away at 8,694 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

J.B.'s Boulder is a climbing area in Yosemite National Park in California, managed by the National Park Service. It sits among a cluster of boulders, with Mantel Boulder, Cracked Boulder and Wave Boulder all about 0.1 mile away. Summer is the most comfortable time to visit. Typical averages from a nearby weather station at Tuolumne Meadows show July highs around 71°F with lows near 38°F, while winter highs stay in the low 40s. A fee is charged for climbing here. Tuolumne Meadows Campground is about 0.8 mile away, and the Pacific Crest Trail passes within a mile. Elizabeth Lake Trailhead and Lembert Dome Trail are also close by for hikers.

Routes (6)

Facts about this crag

Rules & access

Fee
Yes

Source: National Park Service API

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