Main Slab - Upper
Main Slab - Upper in California has 6 trad climbing routes on 4 difficulty grades.
- 6 routes
- 5.4 – 5.10b
- Trad
Best time to visit Main Slab - Upper
Best months: October–May. 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
66° / 37°
Feb
66° / 38°
Mar
71° / 40°
Apr
74° / 44°
May
80° / 51°
Jun
87° / 56°
Jul
94° / 62°
Aug
95° / 62°
Sep
92° / 59°
Oct
82° / 49°
Nov
72° / 41°
Dec
65° / 37°
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at March Afb, CA, 6.2 mi away at 1,516 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
Main Slab - Upper is a climbing area in Lake Perris State Recreation Area in California, managed by State Park and Recreation. It sits among several other climbing spots in the same general area, so it works well as one stop in a day of exploring the park's rock. Spring and fall are the most comfortable times to visit. Typical averages from a nearby weather station show April highs around 74°F and October highs around 82°F, while July and August average in the mid-90s. Main Slab - The Sundeck and Main Slab - Lower are both about 0.1 mile away, and Helios Boulder is just as close. Big Rock Sport Boulder is about half a mile off.
Keep exploring — more climbs worth the drive
Photo: nccmrm97, CC BY-SA 2.0 (via Flickr)Upper Accomazzo Boulders
~28 min drive
Upper Accomazzo Boulders in California has 5 bouldering routes across 4 grades.
Main Slab - Lower
~0 min drive
Main Slab - Lower in California has 41 routes with sport and trad climbing.
Helios Boulder
~0 min drive
Helios Boulder in California has 6 routes ranging from moderate to hard difficulty, offering sport and trad climbing.
Big Rock Sport Boulder
~1 min drive
Big Rock Sport Boulder in California has 12 routes across 10 difficulty grades, offering bouldering, sport, and trad climbing.
Beach Boulders (aka The Mystic Boulders)
~1 min drive
Beach Boulders (aka The Mystic Boulders) is a 6-route bouldering area in California.
Bernasconi Ridge
~1 min drive
Bernasconi Ridge in California has 5 bouldering routes with 5 distinct difficulty grades.
L-Slab/Lakeview Slab
~2 min drive
L-Slab/Lakeview Slab in California has 9 routes from moderate to hard, offering sport and trad climbing.
Big Rock Area
~4 min drive
Big Rock Area in California has 5 climbing routes with bouldering pads and trad.
Romana Boulders
~6 min drive
7 bouldering routes in California, 5 difficulty grades, pad-protected.
Juniper Flats
~8 min drive
Juniper Flats is a California climbing area with 4 routes.
