Massachusetts · Rock climbing · Ayer

Ayer Boulders

25 routes
V0 – V6+
Bouldering
Apr, Jul–Oct
best months

Ayer Boulders is a bouldering area in Massachusetts, about 1.3 miles from the town of Ayer. It sits among a cluster of other climbing spots, with Trashcan Boulder and Chimney Boulders each about 0.1 mile away and Kotik Crag about 0.2 mile away, so it works well as a single stop or as a longer outing with several boulder problems close together. The area is all bouldering, with 25 routes listed, and most of them are graded on the V scale. The easiest are around V0, and the hardest reach V6+. The V scale routes run from V0 to V6+, with the median at V1. A few are also graded on the YDS scale, at about 5.10a. For timing, late spring and early fall are the most comfortable. Typical averages from a nearby weather station in Fitchburg show May highs around 70°F and September highs around 74°F, with July the warmest month at about 83°F. Winter is cold, with January highs near 34°F. Nearby, Spacious Skies Campgrounds - Minute Man is about 2.1 miles away for an overnight stay, and the Esker Loop Trail is about 2.3 miles away for a hike.

  • Best time to go · Apr, Jul–Oct

    Best time to visit Ayer Boulders

    Best months: April and July–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

      34° / 16°

      11 wet

    2. Feb

      37° / 17°

      9 wet

    3. Mar

      45° / 25°

      11 wet

    4. Apr

      58° / 35°

      12 wet

    5. May

      70° / 46°

      13 wet

    6. Jun

      78° / 56°

      13 wet

    7. Jul

      83° / 61°

      12 wet

    8. Aug

      82° / 60°

      12 wet

    9. Sep

      74° / 51°

      11 wet

    10. Oct

      62° / 40°

      12 wet

    11. Nov

      50° / 30°

      11 wet

    12. Dec

      40° / 22°

      11 wet

    Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Fitchburg Muni Ap, MA, 9.7 mi away at 348 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

Routes (25)