Colorado · Bouldering · Whitewater

Thunder Forth

The hardest grade catalogued at Reba Boulders' Sizzler Boulder sector.

V5
grade
Bouldering Pads
style

Best time to visit Thunder Forth

Best months: March–May and September–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

    39° / 19°

    5 wet · 3 snow

  2. Feb

    46° / 25°

    5 wet · 2 snow

  3. Mar

    58° / 34°

    6 wet · 1 snow

  4. Apr

    65° / 40°

    7 wet

  5. May

    76° / 50°

    5 wet

  6. Jun

    88° / 59°

    3 wet

  7. Jul

    93° / 65°

    5 wet

  8. Aug

    90° / 63°

    6 wet

  9. Sep

    81° / 54°

    6 wet

  10. Oct

    67° / 41°

    5 wet

  11. Nov

    52° / 30°

    5 wet · 1 snow

  12. Dec

    40° / 20°

    4 wet · 3 snow

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Grand Junction 6ese, CO, 6.6 mi away at 4,760 ft. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

This climb represents the upper end of the difficulty spectrum at Reba Boulders, where 60 routes have been catalogued across grades V0 to V5 in the Sizzler Boulder sector.