Highlight • Summit
Ontario Peak
Hiking
5.0
(1)
Ontario Peak is a prominent summit rising to 2,651 meters (8,696 feet) in the San Gabriel Mountains of California. Located within the scenic Cucamonga Wilderness of the San Bernardino National Forest, this challenging peak offers a rewarding experience for those seeking high-altitude adventure. It is named for the nearby city of Ontario, situated about 12 miles to its south, and has been a notable landmark since its appearance in the United States General Land Office Forest Atlas in 1908.
What draws many to Ontario Peak are the truly spectacular and expansive views from its summit. Hikers consistently rave about the sweeping panoramas that stretch across the San Gabriel Mountains, the vast Inland Empire, and the sprawling cities of Los Angeles and Orange County. On exceptionally clear days, the distant glimmer of the Pacific Ocean can even be spotted, making the strenuous climb well worth the effort for these unforgettable vistas.
Preparing for the hike to Ontario Peak is essential, as it is considered a challenging endeavor. The most popular route typically begins at the Icehouse Canyon Trailhead, a well-trafficked starting point. This demanding journey covers approximately 12 to 13 miles round trip with a significant elevation gain of around 3,800 to 4,100 feet. Proper footwear, ample water, and layers of clothing are highly recommended due to the varied terrain and potential for changing weather conditions as you ascend.
The best time to hike Ontario Peak is generally during the spring and fall months when temperatures are milder and the skies are often clearest, providing optimal conditions for those incredible viewpoints. Summer can also be a good option, though starting early is advisable to avoid the midday heat. The primary activity here is hiking, with the trail offering a diverse experience from the shaded, creek-side path of Icehouse Canyon to the more exposed, rocky ridge leading to the peak.
The most accessible and popular route to the summit begins at the Icehouse Canyon Trailhead. From there, Forest Service Trail 7W07 leads to Icehouse Saddle, a key junction for various trails in the area. The Ontario Peak Trail then branches off from the saddle, guiding hikers directly to the peak. This route is approximately 13 miles (20.9 km) round trip, involving a substantial 4,100 feet (1,200 m) of elevation gain, making it a strenuous but highly rewarding trek.
Along the trail, visitors encounter several interesting landmarks and natural features. The initial miles through Icehouse Canyon follow a scenic creek, shaded by sugar pines, with massive boulders and old stone ruins adding historical intrigue. Hikers might also pass Kelly Camp, an unimproved wilderness campsite with a past as a mining prospect and trail resort. The final push to the summit is marked by navigating around false summits before reaching the true peak, often identified by an iconic rock nest with a distinctive dead tree, and the chance to spot wildlife like bighorn sheep.
Whether you're looking for a challenging day hike or a rewarding trail running experience, Ontario Peak offers a variety of routes to explore. You can discover detailed maps and plan your adventure using komoot, which provides comprehensive information on the diverse trails available in the Cucamonga Wilderness and San Gabriel Mountains.
This Highlight is in a protected area
Please check local regulations for:
Cucamonga Wilderness
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Nearby routes
Best routes near Ontario Peak
4.8
(5)
42
hikers
19.4km
07:04
1,240m
1,240m
Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels.
Details
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Elevation 2,610 m
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Frequently Asked Questions
What is the most common starting point for hiking Ontario Peak, and what should I know about parking?
The most common starting point for hiking Ontario Peak is the Icehouse Canyon Trailhead. Parking at this popular trailhead can be very challenging, especially on weekends and during peak seasons. It's highly recommended to arrive very early in the morning, ideally before 7:00 AM, to secure a spot. Overflow parking may be available further down the road, but this adds extra distance to your hike.
Do I need a permit to hike Ontario Peak or enter the Cucamonga Wilderness?
Yes, a wilderness permit is required for day hikes and overnight trips into the Cucamonga Wilderness, which includes Ontario Peak. These permits are typically free and can often be obtained at the trailhead or a nearby ranger station. It's advisable to check the San Bernardino National Forest website or call a local ranger station for the most current information on permit requirements and how to obtain them, especially during peak seasons or fire restrictions.
Is Ontario Peak a dog-friendly trail?
Yes, dogs are generally allowed on the trails leading to Ontario Peak, including the popular Icehouse Canyon Trail, provided they are kept on a leash. However, it's crucial to ensure your dog is conditioned for a strenuous, long-distance hike with significant elevation gain. Always carry plenty of water for both yourself and your pet, as water sources can be unreliable, especially higher up the mountain.
What are the specific challenges of the terrain on the way to Ontario Peak?
The terrain to Ontario Peak presents several challenges. The initial section through Icehouse Canyon is shaded and follows a creek, but it quickly transitions to a steep ascent with numerous switchbacks to Icehouse Saddle. From the saddle, the trail becomes more exposed, rocky, and can involve navigating around false summits before reaching the true peak. Hikers should be prepared for uneven footing, loose rock, and significant exposure to the sun on the upper sections.
How long does it typically take to hike Ontario Peak?
The round trip hike to Ontario Peak from the Icehouse Canyon Trailhead is approximately 13 miles (20.9 km) with 4,100 feet (1,200 m) of elevation gain. For an average hiker, this strenuous trek can take anywhere from 8 to 12 hours to complete, depending on fitness levels, pace, and time spent at the summit. It's essential to start early to allow ample time before sunset.
Is Ontario Peak suitable for a winter hike?
While possible, hiking Ontario Peak in winter presents significant challenges and is generally only recommended for experienced hikers with proper gear. The trails can be covered in snow and ice, requiring equipment such as microspikes, crampons, and an ice axe. Weather conditions can change rapidly, and avalanche danger may be present. Always check current trail conditions and weather forecasts before attempting a winter ascent.
Are there any alternative routes to Ontario Peak besides the Icehouse Canyon Trail?
While the Icehouse Canyon Trail to Icehouse Saddle is the most popular and accessible route, hikers can also reach Ontario Peak via other trails that connect to Icehouse Saddle, such as the Chapman Trail or the Cucamonga Peak Trail (which branches off from the saddle). However, these routes are often longer or involve similar strenuous conditions. All routes converge at Icehouse Saddle before the final push to Ontario Peak.
What kind of wildlife might I encounter on the Ontario Peak trail?
The Cucamonga Wilderness is home to diverse wildlife. Hikers on the Ontario Peak trail might spot various bird species, lizards, and smaller mammals like squirrels and chipmunks. More elusive animals include deer, coyotes, and occasionally, bighorn sheep, especially in the higher, rockier elevations. Mountain lions are also present in the wilderness, though sightings are rare. Always observe wildlife from a distance and never feed animals.
Are there any facilities or accommodations near the Icehouse Canyon Trailhead?
The Icehouse Canyon Trailhead itself has very limited facilities, typically just restrooms. There are no cafes, pubs, or direct accommodations right at the trailhead. However, the nearby town of Mt. Baldy Village, a short drive away, offers a few small restaurants and limited lodging options. For more extensive services, including a wider range of dining and accommodation, you would need to look towards larger towns like Upland or Rancho Cucamonga, which are further down the mountain.
What is the historical significance of Kelly Camp along the trail to Ontario Peak?
Kelly Camp, located along the trail to Icehouse Saddle, holds historical significance as an unimproved wilderness campsite. It was originally established as a mining prospect in 1905 and later transformed into a trail resort in 1922. While now just a rustic camp, its past as a hub for early prospectors and visitors adds a layer of historical interest to the journey. A spring is present there, though its reliability can vary seasonally.
How does the difficulty of Ontario Peak compare to Cucamonga Peak?
Both Ontario Peak and Cucamonga Peak are challenging hikes accessible from Icehouse Saddle, and they share similar starting points and initial elevation gain. Many hikers consider them to be of comparable difficulty, both being strenuous day hikes with significant mileage and elevation. Cucamonga Peak is slightly higher in elevation (8,859 ft vs. 8,696 ft for Ontario), but the overall experience and physical demands are very similar for both summits.