San Francisco Peaks
Agassiz Peak Trail
A challenging 12-mile traverse to Arizona's second-highest peak with panoramic alpine views
Distance
12 mi RT
Difficulty
Strenuous
Elevation
3,000 ft
Best Season
Jun-Oct
Trail Overview
Agassiz Peak is Arizona's second-highest point at 12,408 feet, just 225 feet lower than Humphreys Peak. The trail is longer and more challenging than the Humphreys route, with 3,000 feet of elevation gain over 6 miles. The traverse passes through dense spruce-fir forest, alpine meadows, and exposed ridgelines with panoramic views of the entire San Francisco volcanic field.
This is a serious high-altitude hike for experienced backpackers. The trail is less maintained than Humphreys Peak, with more route-finding required above treeline. Weather changes rapidly, and the summit ridge is exposed to lightning and high winds.
Water is available from streams in the lower sections, but you'll need to carry enough for the long summit push.
Trail Milestones
| Mile | Elevation | Feature |
|---|---|---|
| 0.0 | 9,400 ft | Trailhead - Agassiz Trailhead (Lockett Meadow) |
| 2.0 | 10,600 ft | Transition to spruce-fir forest |
| 4.0 | 11,400 ft | Treeline - alpine tundra begins |
| 6.0 | 12,408 ft | Summit - Arizona's second-highest point |
What It's Really Like
Rated 4.7 out of 5 from over 300 reviews, Agassiz Peak is consistently called the more challenging and rewarding alternative to Humphreys Peak. Reviewers love the solitude (fewer people attempt this route), the panoramic views, and the sense of accomplishment.
The first half climbs through dense spruce-fir forest. The trail is rougher and less defined than Humphreys Peak. You'll navigate through fallen trees and steep switchbacks. The air gets thin quickly.
Above treeline is where the real challenge begins. The trail becomes a faint path through alpine tundra. Route-finding skills are essential. The summit ridge is narrow and exposed, with steep dropoffs on both sides. But the views are incredible: you can see Humphreys Peak to the east, the Grand Canyon to the north, and the entire San Francisco volcanic field stretching to the horizon.
Insider tip from reviewers: This route is less crowded than Humphreys Peak, but it's also more dangerous. Bring a map, compass, and GPS. Turn back if weather deteriorates. The summit ridge is no place to be in a thunderstorm.
Water & Safety
Drinking Water: Streams are available in the lower sections, but you'll need to carry 3-4 liters for the long summit push. All water must be treated - carry a filter or purification tablets.
Altitude Sickness: The summit is over 12,000 feet. If you're coming from sea level, spend 1-2 days in Flagstaff (7,000 feet) first. Symptoms include headache, nausea, and dizziness. Descend immediately if symptoms worsen.
Route Finding: The trail above treeline is faint and poorly marked. Bring a detailed map, compass, and GPS. Know how to navigate in alpine terrain.
Weather: The summit is exposed to lightning, wind, and sudden temperature drops. Afternoon thunderstorms are common in summer. Check the forecast and turn back if storms approach.
Emergency: Cell service is limited on the trail. Coconino National Forest Search and Rescue responds to emergencies. The trailhead is in Lockett Meadow, accessible from US 180 north of Flagstaff.
Permits & Regulations
Day Hiking: No permit required for day hiking. Lockett Meadow trailhead requires a fee or a forest pass.
Overnight Permits: Required for backpacking in the Kachina Peaks Wilderness. Obtain from the Coconino National Forest office in Flagstaff.
- Group size limited to 15 people
- Camp 200 feet from trails and water sources
- No campfires above 11,000 feet
Lockett Meadow: The trailhead is in Lockett Meadow, which has a day-use fee ($5/vehicle) or requires a forest pass.
History & Lore
Agassiz Peak is named for Louis Agassiz, a Swiss-American biologist and geologist who was one of the most prominent scientists in the 19th century. The peak was named by early explorers who were mapping the San Francisco volcanic field.
Like Humphreys Peak, Agassiz is part of the eroded remnant of a massive stratovolcano that erupted 1 million years ago. The volcano was once as tall as 16,000 feet, but explosive eruptions and glacial erosion wore it down to the peaks you see today.
The peaks are sacred to the Hopi, Navajo, Zuni, and other Native American tribes. They're home to the Kachinas, spiritual beings that bring rain and fertility. Hikers should respect the cultural significance of these mountains.
External Resources
- USFS Agassiz Peak Information - Official trail details and conditions
- Coconino National Forest - Forest conditions and alerts
- AllTrails Agassiz Peak - Reviews and GPS tracks
Return to: Arizona Backpacking Regions