Sunset Peak Hiking Guide
Sunset Peak sits in the San Bernardino Mountains above the Inland Empire, rewarding hikers with expansive views that stretch from the Los Angeles Basin to the desert floor on clear days. The trail winds through chaparral and conifer forest before breaking onto an open ridge that leads to the summit. At approximately 7 miles round trip with around 2,200 feet of elevation gain, it strikes a balance that appeals to fit beginners and experienced day hikers alike. Fall through spring offers the most comfortable temperatures and the best chance of sharp, smog-free visibility.
Trailhead Access and Parking
The most common approach begins near Icehouse Canyon in the San Bernardino National Forest, accessible from the Mountain Avenue corridor above Upland and Ontario. Drive north on Mountain Avenue until it transitions into a forest road leading toward Icehouse Canyon. Parking is available at a small dirt lot near the canyon mouth; arrive early on weekends as spaces fill by mid-morning. A National Forest Adventure Pass or equivalent federal recreation pass is required to display on your dashboard. Cell service is limited once you enter the canyon, so download offline maps before leaving the trailhead city. No restroom facilities are available at the primary parking area, so plan accordingly.
Trail Route and Terrain
From the Icehouse Canyon trailhead, follow the well-worn path northeast into the canyon, gaining elevation steadily through a canopy of big-cone Douglas fir and incense cedar. After roughly 2 miles, the trail climbs more aggressively onto a connecting ridge route toward Sunset Peak. The upper section is an exposed ridge walk with loose decomposed granite in places, so trekking poles add meaningful stability. The summit sits at approximately 5,796 feet and is marked by a benchmark. The terrain is generally well-signed, but trail junctions can be confusing near the saddle — carry a downloaded topo map and confirm your bearing before continuing toward the summit rather than Cedar Glen or Chapman peaks.
Views and Natural Highlights
The summit panorama is the defining payoff of this hike. On clear winter days after a Pacific storm system passes through, visibility can extend to Catalina Island to the southwest and to the high desert and Big Bear Valley to the northeast. The San Gabriel Valley, Pomona Valley, and the urban sprawl of the Inland Empire spread out below like a relief map. The ridge walk approaching the summit passes through stands of Jeffrey pine and occasional manzanita thickets that burst with small pink blooms in early spring. Watch for mule deer on the lower canyon sections in the early morning, and red-tailed hawks riding thermals above the ridge throughout the day.
Difficulty and Physical Preparation.
The approximately 7-mile round trip with 2,200 feet of gain classifies as moderate, though the sustained climb on the ridge section will challenge hikers who don't regularly train on inclines. Budget 4 to 5 hours for a comfortable round trip that includes time at the summit. Cardiovascular fitness matters more than raw strength here — short, consistent strides and deliberate pacing on the ascent conserve energy for the exposed ridge. Carry at least 2 liters of water per person; there are no reliable water sources on the trail. Elevation at the summit approaches 5,800 feet, which can affect hikers coming from sea level, particularly if they attempt this trail in summer when heat compounds the exertion.
Seasonal Conditions and Weather.
Fall is ideal for Sunset Peak: moderate temperatures, reduced fire risk, and golden light that makes ridge photography especially rewarding. Winter hikes are stunning after snowfall blankets the upper forest, but the trail can become icy above 5,000 feet and microspikes or traction devices become necessary. Spring brings wildflower color to the lower chaparral zones and crisp air that extends summit visibility. Summer hiking is strongly discouraged — afternoon temperatures on exposed sections can exceed 90°F, fire danger is high, and afternoon thunderstorms build quickly over the San Bernardino Mountains from July through September. Always check current fire restrictions on the San Bernardino National Forest website before your visit.
Safety Considerations
Hiking with a group significantly reduces risk on Sunset Peak's more isolated upper sections. Tell someone your planned route and expected return time before heading out. The descent on loose granite requires careful footing, especially if you started early and are fatigued by the time you head back down. Sun exposure is substantial on the ridge, so apply sunscreen and wear a hat regardless of season. Signal coverage is unreliable once you enter the canyon; a personal locator beacon or satellite communicator is a worthwhile precaution for solo or small-group hikers. Dogs are welcome but must be leashed at all times per national forest regulations, and their paws can be stressed by the rough decomposed granite surface on warm days.
Hiking tips for Sunset Peak
- Start no later than 7 a.m. on weekends to secure a parking spot and complete the ridge section before midday heat or afternoon wind picks up.
- Display a National Forest Adventure Pass or America the Beautiful pass on your dashboard — rangers do check this trailhead regularly.
- Bring trekking poles for the descent on loose decomposed granite near the summit; they reduce knee strain and improve balance on the way down.
- Layer clothing for this hike: the canyon bottom can be 15 to 20 degrees cooler than the exposed ridge, and the summit can be windy even on warm valley days.
- Download an offline topo map before leaving cell range — the saddle junction near the upper trail can be confusing, and GPS navigation prevents wrong turns toward neighboring peaks.
Nearby trails to explore
- Icehouse Canyon to Cedar Glen Trail.
- Telegraph Canyon Trail
- Cucamonga Peak Trail
Hike this trail with TrailMates
Planning a group hike to Sunset Peak? TrailMates makes it easy to find partners who match your pace and skill level, coordinate meetups with the built-in 3-person minimum safety feature, and chat before you hit the trail. Download the TrailMates app or download TrailMates from the App Store and find your Inland Empire hiking crew today.