Red Mountain Trail No. 159

Area Status: Open

Located in the Coconino National Forest, about 25 miles northwest of Flagstaff, Arizona, Red Mountain is a striking volcanic cinder cone. Unlike typical symmetrical cones, Red Mountain features a unique "U" shape, with its northeast flank cut by a massive natural amphitheater. The amphitheater is adorned with fascinating erosional pillars known as "hoodoos" and studded with dark mineral crystals that have eroded from the walls. According to research from the U.S. Geological Survey (USGS) and Northern Arizona University, Red Mountain was formed by volcanic eruptions approximately 740,000 years ago.

The trail leading to the amphitheater offers a scenic, lightly-used hike. The last stretch of the path winds through a usually dry stream bed, providing a peaceful trek to the amphitheater’s base. Make sure to bring plenty of water, especially on hot days—1 liter per person is recommended.

Trail Usage: Light
Closest Town: Flagstaff, AZ
Managed By: Flagstaff Ranger District (928-526-0866)
Directions: From Flagstaff, head northwest on Highway 180, which cuts through the San Francisco Volcanic Field en route to the Grand Canyon. After about 25 miles, look for a large Forest Service sign for the Red Mountain Geologic Area at milepost 247. Turn left and drive a quarter mile down a dirt road to the trailhead parking area. The hike from the parking lot to Red Mountain’s base takes around 30 minutes. Trees in the amphitheater provide some shade, but ensure you carry enough water, especially in hotter months.

For more detailed information, check out the USGS/Forest Service brochure on Red Mountain and the surrounding geologic wonders.

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