Washington · Rock climbing · Roslyn

Choss Boss Boulder

Choss Boss Boulder in Washington has 5 bouldering routes across 4 grades.

5 routes
V1 – V7
Bouldering

Best time to visit Choss Boss Boulder

Best months: April–October. 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

    35° / 22°

  2. Feb

    41° / 24°

  3. Mar

    49° / 28°

  4. Apr

    57° / 33°

  5. May

    66° / 40°

  6. Jun

    72° / 47°

  7. Jul

    81° / 53°

  8. Aug

    81° / 51°

  9. Sep

    73° / 43°

  10. Oct

    58° / 34°

  11. Nov

    43° / 28°

  12. Dec

    34° / 22°

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Cle Elum, WA, 4.2 mi away at 1,900 ft. The station sits about 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.

Choss Boss Boulder is a bouldering area in the Roslyn Urban Forest in Washington, on city land. It sits among a cluster of other bouldering spots, with Tara Boulder and Happy Tree Boulder each about 0.1 mile away. The area is close to the Coal Mines Trail, about 0.4 mile off, and the Canyon No. 6 hike is about 1.1 mile away. The climbing here is all bouldering, with five routes ranging from V1 to V7. The most notable is Choss Boss itself, a V3, along with Choss Duster at V2 and Leeverage at V7. The boulders are a compact, easy-to-reach destination for climbers looking to work on a range of grades in a single outing. Summer is the most comfortable time to visit. Typical averages from the nearby Cle Elum weather station, about 4 miles away, show July and August highs around 81°F with lows in the low 50s. Winter is cold, with January highs near 35°F and lows around 22°F.

Routes (5)

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