Massachusetts · Rock climbing · Lynnfield · Near Newburyport

Grenade Boulder

5 routes
V2 – V8-9
Bouldering
Jun–Oct
best months

Grenade Boulder is a bouldering area on Lynn Water Supply Land in Massachusetts, a cluster of boulders with five routes ranging from V2 to V8-9. It sits among several other boulders, including Sponsor Boulder, Behemoth Boulder and Evil Boulder, all within about a tenth of a mile. The most comfortable climbing weather comes in late spring and early fall. Typical averages from a nearby weather station in Reading show May highs around 70°F and September highs around 75°F, with July the warmest month at about 84°F. The routes here are all boulders, and the grade range spans from V2 to V8-9. Grenade Launcher is the hardest, at V8-9, and Dream Team is the easiest, at V2. Pete Otis is the first ascender of several of the routes, and Bob Parrot is the first ascender of Grenade Launcher.

Around this trail

Add any of these when you start a trip
  • Sleep close

    Camp Evergreen

    Campground

    Campground · 7.4 mi from the trail
  • If it rainsDaderot., CC BY-SA 3.0 · Wikimedia Commons

    Rebecca Nurse Homestead

    Museum

    On your way back · 5 mi

Places © OpenStreetMap contributors · Photos: Daderot., CC BY-SA 3.0 (commons)

More in Newburyport
  • Best time to go · Jun–Oct

    Best time to visit Grenade Boulder

    Best months: June–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

      38° / 19°

      12 wet · 8 snow

    2. Feb

      40° / 20°

      11 wet · 7 snow

    3. Mar

      48° / 27°

      13 wet · 6 snow

    4. Apr

      60° / 37°

      13 wet · 1 snow

    5. May

      70° / 47°

      13 wet

    6. Jun

      78° / 56°

      12 wet

    7. Jul

      84° / 63°

      11 wet

    8. Aug

      82° / 61°

      10 wet

    9. Sep

      75° / 53°

      9 wet

    10. Oct

      64° / 42°

      11 wet

    11. Nov

      53° / 32°

      11 wet · 2 snow

    12. Dec

      43° / 24°

      12 wet · 5 snow

    Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Reading, MA, 5.2 mi away at 110 ft. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

Routes (5)