Quail Mountain, Mountain summit in Joshua Tree National Park, California, US.

Quail Mountain, at 5,816 feet (1,773 m), is the highest summit in Joshua Tree National Park and the highest point in the Little San Bernardino Mountains, one of the southernmost peaks of the Transverse Ranges. Its flat top is marked by a large cairn, and the upper slopes are barren, burned desert with few surviving pinyon pines and California junipers.

Quail Mountain was once covered with old-growth California juniper, single-leaf pinyon pine, Joshua tree and coastal sage scrub oak woodland. The Juniper Complex Fire of 1999 burned over the mountain and left it barren of taller woody plants; only a few pinyons and junipers survived to seed a new generation.

The summit is marked by a large cairn built from stones gathered on the flat top. The mountain lies within the Joshua Tree Wilderness, and the California Riding and Hiking Trail crosses the approach to Juniper Flats. Desert bighorn sheep live in the Little San Bernardino Mountains around the peak.

The standard route follows the California Riding and Hiking Trail from the Keys View road for 4.5 miles (7.2 km) to Juniper Flats, then about 1.5 miles (2.4 km) of cross-country travel to the flat summit marked by a large cairn. No trail reaches the top, and shade is scarce along the way.

On February 4, 1999, two civilian T-28 aircraft, N628B and N128BJ, flew from Van Nuys to Thermal Airport as a flight of two. Piloted by Bill Jones and Greg Weber, they struck the west side of the mountain at about 5,300 feet while cloud cover hid the Little San Bernardino Mountains, killing both pilots. Wreckage remains on the slope.