Idaho · Rock climbing · American Falls

Ancient Cluster

Ancient Cluster in Idaho has 6 bouldering routes with 5 difficulty grades.

6 routes
V2 – V7
Bouldering

Best time to visit Ancient Cluster

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, 1.1 mi away at 4,195 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

Ancient Cluster is a bouldering area within Massacre Rocks State Park in Idaho, managed by State Park and Recreation. It sits among several other climbing areas and trails, so it works well as a stop in a day of exploring the park's rock and hiking. The climbing here is all bouldering, with six routes spread across the V2 to V7 range. The easiest is Journey to the Afterlife at V2, and the hardest is Eye of Horus at V7. The routes are close together, with Hindu, Nordic Boulder and Aztec all about 0.1 mile away. 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. The River Trail and Canyon Trail are both within a third of a mile, and Pipeline Campground is about 6 miles away for an overnight stay.

Routes (6)