Hike Into An Ancient Volcano - Flagstaff (Red Mountain)
If you've ever wanted to walk inside an ancient volcano, one of Arizona's most unique hikes is hiding just 30 minutes northwest of Flagstaff.
The Red Mountain Trail takes hikers into the heart of a collapsed volcanic cinder cone that erupted roughly 740,000 years ago. While Arizona is known for the Grand Canyon and Sedona's red rocks, Red Mountain offers an experience unlike anywhere else in the state—and surprisingly, it's still one of Northern Arizona's best-kept secrets.
Quick Facts
Location: 25 miles northwest of Flagstaff off Highway 180
Distance: Approximately 2.5 miles round trip
Difficulty: Easy
Elevation Gain: About 300 feet
Time: 1.5–2 hours
Dog Friendly: Yes (leashed)
Best Seasons: Spring, summer mornings, fall, and mild winter days
A Walk Into Arizona's Volcanic Past
Most visitors don't realize that Northern Arizona sits within the San Francisco Volcanic Field, home to more than 600 volcanic vents and cinder cones. Red Mountain is one of the most impressive.
Unlike Sunset Crater, Red Mountain has been carved open by thousands of years of erosion, creating a massive natural amphitheater. Instead of looking at a volcano from the outside, you actually get to walk inside it.
The towering red cliffs surrounding the basin are lined with unusual rock formations called hoodoos, along with colorful volcanic ash layers and sparkling mineral crystals embedded in the walls.
The eruptiuon has even created some slot like canyons that are lots of fun for kids to explore.
What the Hike Is Like
The trail begins across an open landscape dotted with juniper and piñon pines. The first mile is mostly flat and easy, making it suitable for families and beginner hikers.
As you approach the mountain, the scenery changes dramatically.
A short ladder helps hikers descend into a dry wash that winds directly into the enormous volcanic amphitheater. Suddenly you're surrounded by towering red volcanic walls that make it feel like you've stepped onto another planet.
The deeper you explore, the more incredible the geology becomes.
Look closely and you'll spot:
Towering hoodoo rock formations
Colorful volcanic ash layers
Black lava fragments
Sparkling mineral crystals
Massive walls formed by one of Arizona's ancient eruptions
Final Thoughts
Red Mountain Trail is proof that Arizona's most memorable adventures aren't always the most famous.
In less than two hours, you can hike through juniper forests, descend into a dry volcanic canyon, and stand inside a 740,000-year-old erupted volcano—all on one of the state's easiest and most unique hikes.
If you're looking for an unforgettable Northern Arizona adventure that's still flying under the radar, Red Mountain Trail deserves a spot at the top of your list.
