Best mountain peaks in Cucamonga Wilderness are part of the San Bernardino National Forest, known for their rugged terrain and significant elevation gains. This region features diverse ecosystems, including sub-alpine forests of mixed conifers. The peaks offer extensive vistas of the surrounding landscapes, providing challenging hikes and rewarding views for outdoor enthusiasts. Wilderness permits are required for day hikes and overnight trips.
Last updated: June 29, 2026
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Popular around Cucamonga Wilderness
At 8,989 feet, Telegraph Peak is one of the highest summits in this part of the Cucamonga Wilderness. The running about 7,000 feet is technical and tough, but the views from the top are worth the power-hiking it takes to reach the summit.
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Timber Mountain is an 8,307-foot peak right on the border of Angeles National Forest and San Bernardino National Forest. This peak is a remote-feeling peak in the Cucamonga Wilderness since the summit is at the end of a dead-end trail.
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Cucamonga Peak rises up to 8,862 feet and is one of the most popular peaks that you can access from the Icehouse Canyon Trail. You get an awesome view of the San Gabriel range from the peak, which you should only attempt to run up in the dry season.
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Thunder Mountain is at an elevation of 9,414 feet above sea level and is part of the Mt. Baldy ski resort. One of the ski lifts ends at Thunder Mountain.
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Timber Mountain is at an elevation of 8,307 feet and is four miles southeast of Mount Baldy. It is not the highest peak in the local area, but hikers often describe it as one of the more remote-feeling peaks.
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Telegraph Peak sits at an elevation of 8,989 feet, and can be reached by the Three Ts Trail. Hikers can get a great view of Telegraph Peak from Devil's Backbone Trail.
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Reaching the summit of Cucamonga you know you worked hard! But look around and enjoy the majestic views over the San Gabriel mountains from one of the highest peaks within the mountain range. Bring appropriate gear if you hike in winter conditions. If you hike from the Icehouse Canyon Trailhead please obtain your wilderness permit from the Angeles National Forest, Baldy Ranger Station. If you prefer ascending via Middle Fork Trail, you can obtain the permit from the San Bernardino National Forest, Lytle Creek Ranger Station.
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Among the most popular peaks in the Cucamonga Wilderness, Cucamonga Peak stands out, offering panoramic views over the San Gabriel Mountains. Another highly regarded summit is Bighorn Peak, known for its extensive vistas of Ontario and Cucamonga Peaks and its sense of solitude.
The highest point within the Cucamonga Wilderness is Telegraph Peak, which sits at an elevation of 8,989 feet. It can be reached via the Three Ts Trail, and hikers often get a great view of it from the Devil's Backbone Trail.
Yes, wilderness permits are required for both day hikes and overnight trips into the Cucamonga Wilderness. These can often be obtained at the Icehouse Canyon trailhead. Additionally, an Adventure Pass is needed for parking at trailheads like Icehouse Canyon.
The peaks in Cucamonga Wilderness offer extensive and rewarding views. From Cucamonga Peak, you can enjoy panoramic vistas of Southern California's Inland Empire, Apple Valley, and other notable peaks like Mount San Jacinto and Mount San Antonio. Bighorn Peak also provides impressive views of Ontario and Cucamonga Peaks.
Absolutely. The Cucamonga Wilderness is known for its challenging summits. The hike to Cucamonga Peak from Icehouse Canyon is a strenuous 11.6 to 14-mile round trip with an elevation gain of 4,300 feet. Similarly, the trek to Ontario Peak is considered a challenging but rewarding adventure, typically around 12 to 13 miles round trip with over 4,000 feet of elevation gain.
If you're looking for a more remote feel, Bighorn Peak is an excellent choice, as it doesn't see as many visitors as other nearby summits. Timber Mountain is also often described by hikers as having a more remote feel, providing a sense of solitude.
The diverse ecosystems of the Cucamonga Wilderness offer opportunities for wildlife viewing. While hiking to peaks like Ontario Peak, you might encounter deer, bears, mountain lions, and bighorn sheep. Bighorn Peak is even named after the bighorn sheep population in the area.
Beyond peak bagging, the Cucamonga Wilderness offers a variety of outdoor activities. You can find numerous hiking trails, including challenging routes like the Cucamonga Peak via Icehouse Canyon Trail Loop. For those interested in cycling, there are road cycling routes such as the Mount Baldy Village β Glendora Ridge Road loop. Running enthusiasts can explore trails like the Icehouse Saddle β Cucamonga Peak loop. You can find more details on these activities in the Hiking in Cucamonga Wilderness, Road Cycling Routes in Cucamonga Wilderness, and Running Trails in Cucamonga Wilderness guides.
The best time to visit depends on your hiking preference. The dry season is ideal for running up peaks like Cucamonga Peak. However, the north-facing slopes can retain snow much later in the season, and hikers may encounter snow and ice in colder months, requiring appropriate gear like microspikes. Always check seasonal conditions before heading out.
Yes, it is possible to combine multiple peaks. For instance, a ridgeline connects Bighorn Peak with Ontario Peak, allowing experienced hikers to tackle both in a single, strenuous trip. The Icehouse Canyon Trail also leads to Icehouse Saddle, a central junction for accessing several peaks.
Ontario Peak offers extensive vistas of both the urban sprawl to the south and the stunning San Gabriel Mountains to the north. En route to the peak, you can find the historic Kelly Camp, an unimproved wilderness campsite with remnants of a 1920s trail resort, adding a touch of history to your challenging hike.
Yes, Thunder Mountain, at an elevation of 9,414 feet, is part of the Mt. Baldy ski resort. One of the ski lifts ends at Thunder Mountain, offering a different way to experience a mountain peak in the area.


See even more amazing summits in Cucamonga Wilderness with these guides: