California · Rock climbing · Bakersfield

Crumbly Unknown

Top-grade route at Lower Kern River Canyon mixing bolts and placed protection.

5.10c
grade
Mixed
style

Is Crumbly Unknown open right now?

Closure in the area

There's a closure order in Sequoia National Forest. It doesn't name Crumbly Unknown, so check the source for the area it covers (2 listed).

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

Best time to visit Crumbly Unknown

Best months: February–June and September–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

    57° / 28°

    9 wet · 1 snow

  2. Feb

    57° / 30°

    9 wet · 1 snow

  3. Mar

    60° / 32°

    8 wet · 1 snow

  4. Apr

    64° / 35°

    6 wet

  5. May

    72° / 41°

    4 wet

  6. Jun

    82° / 46°

    1 wet

  7. Jul

    89° / 52°

    1 wet

  8. Aug

    89° / 50°

    1 wet

  9. Sep

    84° / 45°

    1 wet

  10. Oct

    73° / 38°

    3 wet

  11. Nov

    62° / 32°

    6 wet

  12. Dec

    55° / 27°

    8 wet · 1 snow

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Glennville, CA, 13.2 mi away at 3,140 ft. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

One of the hardest routes catalogued at Lower Kern River Canyon, this climb in Kern Canyon Dome combines bolted protection with opportunities for placed gear on the same line.

Photo of the crag

Lower Kern River Canyon — the crag this route is on
Lower Kern River Canyon, California — this photo shows the crag, not this individual route.Photo: Qwert üpoiuz, CC BY-SA 4.0 (via Wikimedia Commons)

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