Idaho · Rock climbing · American Falls

Goomba Boulder

Goomba Boulder in Idaho has 8 bouldering routes across 5 grades.

8 routes
V1 – V7-8
Bouldering

Best time to visit Goomba Boulder

Best months: April–June 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

    35° / 17°

    10 wet

  2. Feb

    39° / 21°

    9 wet

  3. Mar

    51° / 27°

    9 wet

  4. Apr

    59° / 33°

    10 wet

  5. May

    68° / 39°

    10 wet

  6. Jun

    78° / 46°

    7 wet

  7. Jul

    89° / 53°

    5 wet

  8. Aug

    88° / 52°

    6 wet

  9. Sep

    77° / 43°

    6 wet

  10. Oct

    62° / 34°

    7 wet

  11. Nov

    47° / 24°

    9 wet

  12. Dec

    35° / 18°

    10 wet

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Massacre Rocks Sp, ID, 0.7 mi away at 4,195 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

Goomba Boulder is a bouldering area within Massacre Rocks State Park in Idaho, managed by State Park and Recreation. It sits among a cluster of climbing and hiking spots, with the park's main climbing area and the Pohogwe Trail both within a quarter mile. The bouldering here is all on the same rock, with eight routes ranging from V1 to V7-8. The easiest are Koopa Troopa Slab and Yoshi, both V1, and the hardest is Bowser's Chokehold at V7-8. The median grade is V5, so climbers can find a range of challenges in a single outing. For timing, late spring and early fall are the most comfortable. Typical averages from a nearby weather station show May highs around 68°F and September highs around 77°F, while July and August average in the upper 80s. Other climbing close by includes the Parking Lot Boulders and the Pinocchio area, both about 0.2 miles away. The River Trail and Canyon Trail are also within a mile.

Routes (8)