Quick Fact
Zuno Peak is a rugged summit in the San Gabriel Mountains of Southern California, standing at 9,126 feet (2,781 meters) above sea level. Located at 34.3856°N, 117.6106°W, it’s the second-highest peak in the range after Mount San Antonio.
Where exactly is Zuno Peak located?
Zuno Peak sits in the San Gabriel Mountains, about 20 miles northeast of downtown Los Angeles. Those coordinates—34.3856°N, 117.6106°W—pinpoint its exact spot in the Angeles National Forest. Honestly, it’s one of those peaks that feels worlds away from the city, even though it’s practically in L.A.’s backyard.
What mountain range includes Zuno Peak?
Zuno Peak belongs to the Transverse Ranges, a series of east-west mountain chains that cut across Southern California. These ranges shape everything from the Santa Monica Mountains to the San Gabriels, creating the region’s dramatic topography. (Think of them as the spine of SoCal.)
How tall is Zuno Peak?
Zuno Peak stands at 9,126 feet (2,781 meters)—making it the second-highest summit in the San Gabriel Mountains. For comparison, that’s only about 1,000 feet shorter than Mount San Antonio, the range’s tallest peak.
What’s the nearest city to Zuno Peak?
Pasadena sits about 20 miles southwest of Zuno Peak, making it the closest major city. From there, you’re looking at a scenic drive through the foothills before hitting the trailhead.
Which trail leads to Zuno Peak?
The Colby Trail is the primary route to Zuno Peak, a grueling 9-mile round-trip hike with a 3,200-foot elevation gain. Start at Buckhorn Campground (5,920 ft elevation) and prepare for steep climbs through pine forests and granite slabs.
Is a permit required to hike Zuno Peak?
Day hikers don’t need permits, but overnight campers in the San Gabriel Wilderness must grab a free self-issued wilderness permit at the trailhead. It’s a simple process—just fill out a form and move on.
What’s the best season to hike Zuno Peak?
Summer and early fall are ideal—snow usually melts off by June, leaving manageable conditions. Winter hikes are possible but trickier; November through April often brings road closures and icy trails. Always check the National Weather Service forecast for Mount Wilson before you go.
How difficult is the Colby Trail?
The Colby Trail is strenuous, no way around it. You’ll climb 3,200 feet over 9 miles round-trip, with steep sections and loose granite. Most hikers take 6–8 hours to reach the summit—so bring plenty of water and snacks.
Are there other trails to Zuno Peak besides Colby?
Yes! The Stony Ridge Trail, maintained by L.A. County Parks, intersects with Colby Trail near Zuno Peak’s saddle. It’s a shorter option if you’re willing to tackle extra elevation.
What’s the weather like at Zuno Peak?
Expect rapid changes—even summer temps at the summit can dip below freezing. Wind is common, and storms roll in fast. The Mount Wilson forecast is your best bet since conditions there mirror Zuno Peak’s.
Who was Zuno Peak named after?
The peak honors Dr. Zuno Martinez, a geologist and surveyor who mapped the San Gabriels in the 1920s. He also pushed for conservation efforts, leaving a legacy that still shapes the region today.
What geological features define Zuno Peak?
Zuno Peak’s granite core tells millions of years of tectonic history, shaped by the San Andreas Fault. The steep slopes and chaparral-covered foothills are classic San Gabriel terrain—rugged, dramatic, and full of character.
Is Zuno Peak part of a protected wilderness area?
Yes! Since 2020, the Angeles National Forest (including Zuno Peak) has been part of the U.S. Forest Service’s San Gabriel-Oak Grove Wilderness. That designation protects over 38,000 acres of wildland.
What wildlife lives near Zuno Peak?
The peak is home to the endangered San Gabriel slender salamander (Batrachoseps gabrieli), found only in these mountains. According to the National Park Service, it thrives in moist, shaded north-facing slopes.
Are there rock climbing opportunities at Zuno Peak?
Absolutely. The exposed ridges attract climbers, especially in winter when snow and ice add difficulty. The granite slabs offer technical challenges—perfect for experienced climbers looking for a serious workout.
What should hikers know before visiting Zuno Peak?
First, check road conditions—winters bring snow and closures. Bring layers; summit temps can surprise you. The nearest ranger station is in Arcadia, but trailhead permits (for overnight trips) are self-issued. Pack light but smart—this hike isn’t a casual stroll.
