Massachusetts · Bouldering · Ayer
Unknown Crack
- V2
- grade
- Bouldering Pads
- style
- Apr, Jul–Oct
- best months
One of eight climbs catalogued at Chimney Boulders, this route sits in the middle of the crag's range from V0-1 to V7-8.
- Kotik CragRock climbing · Next door
- Trashcan BoulderRock climbing · Next door
- Ayer BouldersRock climbing · Next door
- Harrrvard YarrrdRock climbing · ~8 min drive
- Bolton/LancasterRock climbing · ~17 min drive
- Powder House CragRock climbing · ~17 min drive
- Black RockRock climbing · ~17 min drive
- Chelmsford Lime QuarryRock climbing · ~18 min drive
- Fessenden BlockRock climbing · ~19 min drive
- Bird Gang BoulderRock climbing · ~20 min drive
Best time to visit Unknown Crack
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.
Jan
34° / 16°
11 wet
Feb
37° / 17°
9 wet
Mar
45° / 25°
11 wet
Apr
58° / 35°
12 wet
May
70° / 46°
13 wet
Jun
78° / 56°
13 wet
Jul
83° / 61°
12 wet
Aug
82° / 60°
12 wet
Sep
74° / 51°
11 wet
Oct
62° / 40°
12 wet
Nov
50° / 30°
11 wet
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.
