Corner
One of two problems at Roadside Boulder sector.
- V0-
- grade
- Bouldering Pads
- style
Best time to visit Corner
Best months: February–November. 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
54° / 42°
11 wet
Feb
55° / 42°
11 wet
Mar
58° / 43°
10 wet
Apr
62° / 44°
7 wet
May
68° / 49°
4 wet
Jun
76° / 55°
1 wet
Jul
82° / 62°
1 wet
Aug
83° / 61°
0 wet
Sep
80° / 60°
1 wet
Oct
72° / 54°
4 wet
Nov
60° / 46°
7 wet
Dec
53° / 41°
11 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Mt Diablo Junction, CA, 1 mi away at 2,170 ft. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
One of just two boulder problems catalogued at Mount Diablo State Park's Roadside Boulder sector.
Keep exploring — more climbs worth the drive
Photo: Dan Harrelson, CC BY 2.0 (via Flickr)Butt Rock
~3 min drive
Butt Rock in California has 5 sport climbing routes across 4 difficulty grades.
Photo: Dan Harrelson, CC BY 2.0 (via Flickr)Middle Tier
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Middle Tier in California has 9 climbing routes across 7 grades, offering mixed and sport climbing.
Photo: Dan Harrelson, CC BY 2.0 (via Flickr)Lower Tier
~3 min drive
Lower Tier in California has 14 climbing routes across 7 grades, offering mixed, sport, and trad styles.
Photo: @bastique, CC BY-SA 2.0 (via Flickr)The Rock of Ages
~4 min drive
Rock of Ages, The is a sport climbing crag in California with 5 routes.
Photo: @bastique, CC BY-SA 2.0 (via Flickr)Flintstone Rock
~5 min drive
Flintstone Rock in California has 5 sport climbing routes across 4 difficulty grades.
Photo: @bastique, CC BY-SA 2.0 (via Flickr)Mammoth Rock
~5 min drive
Mammoth Rock in California offers 5 climbing routes across 3 difficulty grades, with sport and trad options.
Pine Canyon
~5 min drive
Pine Canyon in California has 16 climbing routes across 11 grades, offering mixed, sport, and trad styles.
Photo: albategnius, CC BY-SA 2.0 (via Flickr)Deliverance Rock
~5 min drive
Deliverance Rock in California has 6 sport climbing routes across 6 difficulty grades.
Pinnacle Rock
~30 min drive
Pinnacle Rock in California has 10 routes across 9 grades, offering bouldering and sport climbing.
Photo: albategnius, CC BY-SA 2.0 (via Flickr)Cragmont Park
~30 min drive
Cragmont Park in California has 3 bouldering routes.

