Hayden Butte is a volcanic landmark in Tempe, Arizona, offering sweeping panoramic views, ancient petroglyphs, and a short but rewarding urban hike.
Hayden Butte, also known as A-Mountain for the large letter painted on its face by Arizona State University students, is one of the most historically layered natural sites in the Tempe area. The butte is a remnant of ancient volcanic activity and sits within a small preserve managed by the City of Tempe, protecting both its ecological character and its cultural significance. The Hohokam people, who inhabited this region for centuries before European contact, left petroglyphs on the rock surfaces here, making the site a rare place where prehistoric human presence remains visible in the middle of a busy university city.
The main trail to the summit is relatively short, gaining elevation quickly over loose basalt and compacted dirt, and the ascent takes most visitors around fifteen to twenty minutes at a relaxed pace. From the top, the 360-degree view takes in Camelback Mountain to the north, the South Mountain Preserve to the south, the broad shimmer of Tempe Town Lake directly below, and the dense grid of the greater Phoenix metropolitan area stretching toward the horizon in every direction.
The surrounding Hayden Butte Preserve also includes lower loop paths that wind along the base of the hill, where native desert plants including saguaro cactus, palo verde, and brittlebush grow in the thin volcanic soil. Because the site sits within easy walking distance of ASU's campus and the Mill Avenue dining and shopping district, it fits naturally into a broader day spent exploring Tempe. The combination of accessible terrain, genuine archaeological interest, and one of the finest urban viewpoints in the Valley of the Sun makes Hayden Butte a destination that holds its own against far more remote Arizona landscapes.
Visit during early morning on weekdays to avoid crowds and catch cooler temperatures, particularly from late spring through early fall when midday heat can be intense.
Bring at least one liter of water per person even for the short summit trail, as there are no water sources on Hayden Butte and the exposed basalt radiates heat.
Look closely at the dark rock faces along the lower trail for petroglyphs left by the Hohokam people, taking care never to touch or trace the carvings.
Arrive near sunset for some of the most dramatic views across Tempe and the wider Valley of the Sun, with the fading light catching the skyline and Tempe Town Lake below.
Wear sturdy closed-toe shoes with good grip, as the volcanic rock surface can be loose and uneven in sections, especially on the steeper upper portions of the trail.
Enjoy a fun group ride with up to 6 adults and 2 children on a triple surrey bike.
Enjoy a fun group outing on Tempe Town Lake with a donut boat for up to 10 people.
Enjoy a fun group ride with space for up to 4 adults and 2 small children.
Paddle a stable single kayak and enjoy a relaxing time on the water.