This past weekend, my husband and I finally got around to hauling our butts nearly three hours down to Anza-Borrego Desert State Park to hike one of the best-known slot canyons in Southern California, The Slot. The Slot is a slot canyon hike (obviously) located in Anza-Borrego Desert State Park, down in San Diego county. The trail is a 2.3-mile loop and is rated moderate according to AllTrails.