Overview
San Gabriel Peak sits at 6,161 feet in Angeles National Forest and is the highest point in the San Gabriel front range — the ridge that forms the visible wall of mountains above the San Gabriel Valley and much of eastern Los Angeles. From the 210 Freeway, from Pasadena rooftops, from the Rose Bowl parking lot, the peak is right there, visible to millions of people who've never walked to the top.
The hike from Red Box Junction on the Angeles Crest Highway is 6.2 miles out-and-back with 1,300 feet of elevation gain. It's moderate by San Gabriel standards: strenuous enough to feel like an accomplishment, manageable enough for fit hikers who don't do mountains regularly. The views from the summit are the reason to make the drive. On a clear winter day after storms have cleaned the air, you can see the ocean to the west, the Mojave to the north, and the sprawl of Los Angeles laid out in full below you.
This is not a famous trail. It doesn't appear on many lists. The trailhead doesn't have a big sign. That's precisely the point: San Gabriel Peak is the answer to "I want real summit views without fighting the crowds at Mt. Baldy."
The Route
Red Box Junction to Kenyon Devore Trail junction (0 to 0.5 miles): The trail starts at the Red Box parking area on Highway 2. Follow the signed trail east from the parking area. The first half mile is relatively flat, crossing open chaparral with views south toward the Arroyo Seco drainage.
Kenyon Devore Trail to upper ridge (0.5 to 2.2 miles): The Kenyon Devore Trail heads north and begins climbing through mixed chaparral and scattered pines. The grade is consistent but not brutal: steady switchbacks gaining elevation without any particularly steep pitches. You'll pass through areas that show fire history from past Angeles burns, with new growth mixed in with charred trunks. The ridge gradually comes into view as you ascend.
Upper ridge to summit (2.2 to 3.1 miles): Near the top, the trail reaches the ridge connecting San Gabriel Peak to the neighboring Mt. Disappointment. Turn right (east) toward the summit. The final approach crosses open terrain with increasingly expansive views. A concrete structure at the summit marks the highpoint — remnants of a former communications installation. The views here are unobstructed in all directions.
What You'll See from the Summit
The summit view is the reason to do this hike. To the south, the San Gabriel Valley and the LA basin extend to the horizon, with downtown Los Angeles visible in the distance. On clear days (typically November through March after rain), the Santa Ana Mountains and Catalina Island are visible to the southwest. To the north, the Mojave Desert stretches toward the Antelope Valley. East and west, the Angeles Crest ridgeline runs through higher peaks: Mt. Wilson with its observatory domes is visible to the east, and the front range continues toward La Canada to the west.
The contrast is part of the experience: standing above 6,000 feet in a genuine mountain environment while the world's second-largest urban area sits directly below you.
When to Visit
October through March is the best window for air clarity. Post-rain days are the gold standard: smog clears completely, and the view to the ocean is reliable. Bring an extra layer — temperatures on the summit can be 20 to 30 degrees cooler than the valley below.
April through June: Wildflowers on the chaparral slopes, comfortable temperatures, reasonable visibility. Good hiking weather without the cold of midwinter.
July through September: Heat and smog reduce the summit view significantly. Temperatures at the trailhead can exceed 85 degrees, and the trail offers limited shade below the upper ridge. Start before 7 AM if hiking in summer.
Winter snow: The upper ridge and summit occasionally receive snow after major storms, typically December through February. The trail can be icy and requires traction devices (microspikes) when snow is present. Check conditions before heading up — the Angeles Crest Highway may also be closed in heavy snow.
Practical Details
Parking: Red Box Junction has a small pullout that fits about 15 cars. An Adventure Pass is required. The trailhead is on the north side of Highway 2 at the junction with Mt. Wilson Road. It's not prominently signed from the highway, so slow down and watch for it around mile marker 37. On busy weekends, overflow parking requires walking up the highway shoulder for a short distance.
Dogs: Allowed on leash. The trail surface is good for dogs. Water sources along the route are unreliable, so carry enough for your dog as well.
Cell service: Limited to nonexistent in the upper canyon sections. Let someone know your plan before heading up.
Mt. Disappointment extension: From the summit of San Gabriel Peak, the ridge trail continues west to Mt. Disappointment (5,994 ft), adding about 1.5 miles and 500 feet of additional gain for a longer day. The name comes from a surveying party in 1875 who climbed what they thought was the highest peak in the range, only to find Mt. Wilson higher to the east.
Getting There
From the 210 Freeway in La Canada Flintridge, take the Angeles Crest Highway (Highway 2) north and east. Drive approximately 14 miles on the winding highway. Red Box Junction is at the intersection of Highway 2 and Mt. Wilson Road, identified by a small parking area on the north side. The drive from La Canada takes about 30 to 40 minutes depending on traffic on the Angeles Crest. From downtown LA, allow 60 to 75 minutes.
The Bottom Line
San Gabriel Peak is the Angeles hike for people who want summit views without the crowds, or who aren't ready for the full commitment of Mt. Baldy's Devil's Backbone. The trail is well-defined, the elevation gain is manageable, and the payoff at the top — 6,000 feet of altitude with the Pacific to the west and the Mojave to the north — is legitimately outstanding. Come on a clear weekday in December or January, and you may have the summit entirely to yourself.