Warm Up Boulder
7-boulder bouldering crag in California with 4 difficulty grades.
- 7 routes
- V1 – V5
- Bouldering
Is Warm Up Boulder open right now?
Closure in the area
There's a closure order in Mountaintop Ranger District. It doesn't name Warm Up Boulder, so check the source for the area it covers.
Radford Fire Closure Area
Agency closure covering Mountaintop Ranger District · Order 05-12-52-24-06 · USFS · Mountaintop Ranger District
Safety Alert - Falling Rocks at Bonita Falls
Agency alert covering San Bernardino National Forest · USFS · San Bernardino National Forest
Fire Restrictions
Agency alert covering San Bernardino National Forest · Order 05-12-00-26-05 · USFS · San Bernardino National Forest
As of · Source: USFS · Mountaintop Ranger District. Agencies don't list every closure — check before you go.
Best time to visit Warm Up Boulder
Best months: May–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
46° / 24°
6 wet
Feb
46° / 24°
6 wet
Mar
51° / 27°
6 wet
Apr
57° / 31°
4 wet
May
66° / 37°
2 wet
Jun
75° / 43°
1 wet
Jul
80° / 50°
2 wet
Aug
79° / 49°
3 wet
Sep
73° / 44°
2 wet
Oct
63° / 35°
2 wet
Nov
53° / 28°
3 wet
Dec
46° / 24°
6 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Big Bear Lake, CA, 7.9 mi away at 6,753 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
Warm Up Boulder is a bouldering area in the Mountaintop Ranger District of San Bernardino National Forest in California, managed by the Forest Service. It sits among a cluster of climbing spots, with The Warm Up Boulders and Highball Boulder each about 0.1 mile away. The climbing here is all bouldering, with seven routes spread across the V1 to V5 range on the V scale. Cold Day In Hell is the easiest at V1, and Warm Up Traverse is the hardest at V5. The area is best suited to a short session rather than a full-day outing. Summer is the most comfortable time to visit. Typical averages from the nearby Big Bear Lake weather station show July highs around 80°F with lows near 50°F, while winter highs sit in the mid-40s. Nearby, Little Green Valley and the Ve Trail offer hiking within a mile. Shady Cove Group Campground is about a mile away, and Arrowbear Lake is roughly 1.6 miles off.
Keep exploring — more climbs worth the drive
Highball Area
~0 min drive
Highball Area in California has 6 climbing routes across 3 grades.
Tendon Damage Boulder
~0 min drive
Tendon Damage Boulder in California has 9 bouldering routes on rock with 4 difficulty grades.
The Awk Boulder
~0 min drive
Awk Boulder, The is a bouldering area in California with 6 routes.
The Incognito Boulders
~0 min drive
Incognito Boulders, The is a bouldering area in California with 3 routes.
Jalapeño Boulder
~0 min drive
Jalapeño Boulder in California offers 7 bouldering routes across 6 grades.
Blue Moon Boulder
~0 min drive
Blue Moon Boulder in California has 9 bouldering routes rated from v2 to v5.
Wave Boulder
~0 min drive
Wave Boulder in California has 5 bouldering routes across 4 difficulty grades.
Jalapeño Area
~0 min drive
Accessible California climbing area with varied routes for mixed abilities.
The Big Heat Formation
~0 min drive
Big Heat Formation, The in California has 15 climbing routes with bouldering pads.
The Voodoo Formation
~0 min drive
Voodoo Formation is a 7-route bouldering crag in California with 6 difficulty grades.
