Acid Canyon Loop

The Acid Canyon Loop offers an easy hike spanning 1.2 miles (1.9 km) with an elevation gain of 115 feet (35 metres), typically completed in about 31 minutes. You'll walk through beautiful open pine stands, including ponderosa pine and mountain mahogany, enjoying picturesque canyon views and scenic vistas. While generally considered easy, the terrain can be rough and uneven in sections, with rocky paths and varied slopes. The first half of the loop is gentle, but the second half presents a steeper, more challenging ascent.

You can easily access the trailhead for the Acid Canyon Loop near the Los Alamos County Aquatic Center, just a short distance from downtown Los Alamos. The trail is accessible year-round, though snow and ice can make navigation more difficult during winter months. Sturdy shoes are recommended due to the uneven surfaces you will encounter. Leashed dogs are welcome to join you on this scenic route.

This trail holds historical significance, having been built around 1920 by the Los Alamos Ranch School. The unique geography of the area also played a role in Los Alamos being chosen for the Manhattan Project's secret laboratory. The loop connects to a network of other trails, such as the Ranch School Trail and Pueblo Canyon Rim, offering options for longer hikes if you wish to explore further.