Cornerstone
- V2
- grade
- Bouldering Pads
- style
- Apr–Oct
- best months
One of six climbs catalogued at Lower Tier, this boulder problem sits within the Stretch Armstrong Boulder sector. First ascent by Jon Mazza.
Parsippany Rock HouseRock climbing · ~14 min drivePhoto: Magpieturtle, CC BY 4.0 (via Wikimedia Commons)- Ball Field BouldersRock climbing · Next door
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Best time to visit Cornerstone
Best months: April–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
36° / 19°
11 wet
Feb
39° / 19°
9 wet
Mar
47° / 27°
11 wet
Apr
59° / 38°
11 wet
May
70° / 48°
11 wet
Jun
78° / 57°
11 wet
Jul
83° / 61°
10 wet
Aug
81° / 59°
9 wet
Sep
75° / 52°
8 wet
Oct
63° / 41°
9 wet
Nov
51° / 32°
8 wet
Dec
41° / 25°
10 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Charlotteburg Rsvr, NJ, 5.2 mi away at 778 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
