San Gorgonio Mountain, also known locally as Mount San Gorgonio, or Old Greyback, is the highest peak in Southern California at 11,503 feet (3,506 m). It is in the San Bernardino Mountains, 27 miles (43 km) east of the city of San Bernardino and 12 miles (19 km) north-northeast of San Gorgonio Pass. It lies within the San Gorgonio Wilderness, part of the San Bernardino National Forest. Spanish missionaries in the area during the early 17th century named the peak after Saint Gorgonius.
Since it is the highest point in a region which is separated from higher peaks (e.g. in the Sierra Nevada) by relatively low terrain, San Gorgonio Mountain is one of the most topographically prominent peaks in the United States. It is ranked 7th among peaks in the 48 contiguous states and 18th among overall.
Several trails lead to the broad summit of San Gorgonio Mountain, which rises a few hundred feet (100 m) above the tree line. Most routes require well over 4,000 feet (1,200 m) of elevation gain. The trail leading from the Fish Creek Trailhead to San Gorgonio Mountain has about 3,400 feet (1,000 m) of gain, less than the routes from the South Fork and Vivian Creek trailheads. Hikers should always take caution because some junctions on this trail are not well marked.
Highest Point in: San Bernardino Mountains
Elevation: 11,503 ft (3,506 m)