Location and surroundings
Sandstone Peak belongs to the chain North American Cordillera > Pacific Coast Ranges > Transverse Ranges > Santa Monica Mountains. It lies in California, United States, in Ventura County and the municipality of Old Malibu. At 948 m, it is the highest of the 34 named peaks in the Santa Monica Mountains and the range high point. The terrain around it is a chaparral-covered ridge landscape with short, steep approaches and open viewpoints.
Neighbouring peaks
The closest named peaks and passes form a tight cluster around the summit:
- Split Rock — 756 m, 0.5 km NE
- Skull Rock — 816 m, 0.5 km NW
- Boney Peak — 859 m, 0.9 km SW
- Balanced Rock — 764 m, 0.9 km NE
- Exchange Peak — 899 m, 1.4 km SW
- Tri Peaks — 917 m, 1.7 km W
- Boney Mountain — 865 m, 2.7 km W
- Clarks Peak — 600 m, 5.0 km SW
Sandstone Peak is higher than all of these nearby summits, with only Tri Peaks and Exchange Peak coming close in height.
The view from the summit
From Sandstone Peak, the main higher-ground landmarks within 25 km are easy to place on the horizon. Big Dome lies 1.5 km to the west at 888 m, Castro Peak is 14.0 km east at 855 m, and Simi Peak is 16.8 km northeast at 732 m. Farther out are Saddle Rock 9.8 km east, McAuley Peak 20.0 km east, and South Mountain 25.0 km north. The summit also looks over Malibu, the Pacific Ocean, the Conejo Valley, and four Channel Islands.
The range
Sandstone Peak is the highest point of the Santa Monica Mountains, which contain 34 named peaks. The range is part of the Transverse Ranges in the Pacific Coast Ranges of the North American Cordillera. Within that range, Sandstone Peak ranks first by elevation. The summit is a useful reference point for the western end of the mountains and for the trail network that crosses them.
Climbing routes
The best-known route is the Sandstone Peak Trail, which leads to the summit and connects with the wider trail system, including the Backbone Trail. A commonly used approach also follows the Mishe Mokwa Trail from Yerba Buena Road, where it meets the Sandstone Peak Trail junction before the final climb. The mountain is usually treated as a hiking objective rather than a technical climb, and the route choice mainly affects distance and time on foot.
Access and starting points
Malibu is the usual starting town for visits to Sandstone Peak. OpenStreetMap mapping shows the nearest car park, Sandstone Peak Trailhead Parking, 1.1 km southeast of the summit at about 620 m. There are five car parks within 2 km of the top, and the nearest marked hiking route is the Backbone Trail, which runs over or next to the summit. A picnic site lies 1.1 km southeast, and the summit viewpoint itself is mapped just 10 m north of the top.
Climate and weather
These are estimates from NASA POWER climate data adjusted to summit height. At the summit, the warmest month is September at about 18 °C, and the coldest is January at about 11 °C. Mean temperatures stay above freezing in every month. Around the mountain, annual precipitation is about 400 mm, with the wettest month in January at about 95 mm and the driest in June at about 0 mm. In this coastal range, dry-season heat, winter rain, and occasional strong winds are the main weather concerns.
Best time to visit
Because the summit stays above freezing all year, Sandstone Peak can be visited in any season, but conditions are usually most comfortable in the cooler months of spring, autumn, and winter mornings. The driest stretch is late spring into early summer, with June the driest month around the mountain. Summer outings should start early, since exposed ridges can heat up quickly and shade is limited on much of the approach.
Nature and wildlife
The mountain sits in a chaparral landscape typical of the Santa Monica Mountains, with dry slopes, rocky outcrops, and open ridges. Coastal sage scrub and chaparral plants are common at this elevation, and the area supports birds of prey, small mammals, reptiles, and other wildlife adapted to warm, dry hills. The summit lies in or near the Santa Monica Mountains National Recreation Area and Circle X Ranch, both of which help protect the surrounding trail country and habitat.
Guides and organised ascents
For a hike like Sandstone Peak, a certified guide is usually not necessary, but it can be useful for visitors who want route-finding help, local natural history, or a longer day on linked trails. In the United States, the national mountain guide association is the American Mountain Guides Association, an IFMGA/UIAGM member, and the national alpine club is the American Alpine Club. Examples of established guiding companies in the country include RMI Expeditions and Exum Mountain Guides. Some peaks in the United States require registration or permits from the land agency, especially in managed mountain areas.
Safety and preparation
Sandstone Peak is a short mountain outing, but the terrain still calls for proper shoes, sun protection, and enough water for a dry ridge walk. The exposed slopes can be hot in summer, and winter rain can make the trails slippery. Carry a map or offline navigation, since trail junctions in the Santa Monica Mountains can be confusing in poor visibility. For mountain rescue in the United States, the emergency number is 911; dispatchers alert the local search and rescue team.
History and name
The mountain is also known as Mount Allen. The name was linked to W. Herbert Allen, who donated land for nearby Camp Circle X and other Boy Scout camps. The Boy Scouts of America asked the U.S. Board on Geographic Names to rename the peak for him, but the request was rejected because the board did not approve geographic names for living people. The summit still carries the name Sandstone Peak, and a bust of Allen is placed at the top.
Interesting facts
Sandstone Peak is the highest named summit in the Santa Monica Mountains and the range high point. The nearest higher-looking cluster is actually lower: Tri Peaks reaches 917 m, still 31 m below the summit. The mountain is close to the coast, yet it also overlooks inland valleys, which makes it a useful viewpoint for both the Pacific side and the interior side of the range. Its summit area is part of a heavily used trail landscape rather than a remote alpine setting.
FAQ
How high is Sandstone Peak? It rises to 948 m.
Where is Sandstone Peak? It is in Ventura County, California, in the Santa Monica Mountains of the United States.
Is Sandstone Peak the highest mountain in the Santa Monica Mountains? Yes. It is the highest point of the range and the highest of its 34 named peaks.
What peaks are closest to Sandstone Peak? The nearest are Split Rock and Skull Rock, both 0.5 km away, followed by Boney Peak and Balanced Rock.
Are there huts on Sandstone Peak? Yes: a picnic site is mapped 1.1 km southeast of the summit.
Is there water on the way to Sandstone Peak? The summit area is dry and exposed, so carry your own water. For a day hike, plan on about 1.5 to 3 litres depending on heat and route length.
How long does it take to walk up Sandstone Peak? From Sandstone Peak Trailhead Parking, the rough walking time is about 40–60 minutes for roughly 1.5 km on foot and 320 m of ascent; the real path may be longer.
Is mobile phone coverage likely on Sandstone Peak? There are 6 communication masts mapped within 10 km, and the nearest is 5.2 km northwest. On an open summit a signal is likely, but it can fail behind ridges or in gullies. 112 reaches emergency services over any available network, and maps should be downloaded before you go.