Flash floods formed the breathtaking slot canyon. Simply named The Slot, this narrow siltstone canyon provides one of the most exciting hikes in Anza-Borrego Desert State Park. The Slot Canyon Trail is located off CA in the center of the park and. Hiking route, map, cost, photos, as a loop and out-and-back. The dirt road to the trailhead is a not well marked off of highway We had no problem driving on the dirt. Slot Canyon is an unmaintained trail off a sand road and far from most visitor traffic. This mike trek is capped. . This is an amazingly fun and interesting hike into the bowels of the. How to hike The Slot canyon in Anza-Borrego Desert State Park, California. At. The Slot Canyon Trail in Anza-Borrego Desert State Park, known simply as “The Slot,” is an easy out-and-back hike, that winds through a deep and extremely. It's such a unique hike in Anza Borrego — such remarkable topography! The canyon walls get so narrow you have to literally squeeze your way. The sandstone canyon walls get taller and more animated-looking in their form as you go. The park is very large and has multiple road options to get there. This was our favorite hike in Anza-Borrego. Just 20 minutes outside of Borrego Springs, the Anza Borrego slot canyon hike is sure to make a memorable adventure for your whole family. The park has no fees. The slot is a beautiful natural formation nestled in the heart of Anza Borrego State Park, about an hour and a half east of San Diego.