"Although short, Calcite Mine Trail is a challenging trail for high-clearance 4WD vehicles, mountain bikes, and hikers. Keep an eye out for the information board that marks the start of the trail, which descends to cross through the south fork of Palm Wash, climbing out the other side on a narrow shelf road. Sections of this wartime road are beginning to wash away, leaving a narrow path for vehicles around the natural erosion. The trail then runs along the ridge top, offering good views south toward Mexico. The difficult section of the trail starts 0.9 miles from the start. Deep, uneven sections need to be straddled, and careful wheel placement is necessary to avoid dropping into them or catching your undercarriage on rocks. The clay surface is very greasy when wet, and the trail should be avoided after rain. The deep sediment walls of Palm Wash are below you as the trail climbs a rough shelf road. The trail becomes more difficult after crossing through Palm Wash; there are large embedded boulders to climb. Extra vehicle undercarriage clearance and stamina on foot or mountain bike are advantages here. Be sure to use a spotter to watch vehicle underbody clearance; it can be a little deceptive in spots. Hiking up or down Palm Wash from the old Calcite Mine trail crossing takes you into a wonderland of narrow, slotlike canyons. Special Attractions: Panoramic view from the Salton Sea to northern Mexico; Challenging short trail requiring an excellent stock vehicle and an experienced driver; Calcite crystals and the remains of the Calcite Mine. Skilled, experienced four-wheel drivers only. This trail includes very challenging sections with extremely steep grades, loose surfaces, large rocks, deep ruts, and/or tight clearances. Mud or sand may necessitate winching."