Main Slab - The Sundeck
5 routes, 4 grades, sport and trad climbing at Main Slab - The Sundeck in California.
- 5 routes
- 5.9 – 5.11a/b
- Trad · Sport
Best time to visit Main Slab - The Sundeck
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 - The Sundeck is a climbing area within Lake Perris State Recreation Area in California, managed by State Park and Recreation. It sits among a cluster of other climbing spots, with Main Slab - Upper and Main Slab - Lower both about 0.1 mile away and Helios Boulder at a similar distance. 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. Big Rock Sport Boulder is about half a mile off, and the Lakeview Slab Rock Climbing Approach hike lies roughly 1.7 miles away. Farther out, the Juan Bautista Trail is about 2.4 miles away, and the San Jacinto River offers paddling about 6.9 miles from the area.
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.
Romana Boulders
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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.
Double Butte Mountain
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Double Butte Mountain in California has 7 bouldering routes across 6 difficulty grades.
Ramona Egg Ranch Boulders
~18 min drive
Ramona Egg Ranch Boulders in California has 20 routes across 14 grades, offering bouldering pads, sport, and trad climbing.
Beer Me Boulders
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5 bouldering routes at Beer Me Boulders in California.
Steele Valley
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Steele Valley in California has 5 bouldering routes across 5 difficulty grades.
