Lookout Mountain (Los Angeles County, California)

Mount Baldy or Mount Baldy Village, formerly Camp Baynham and Camp Baldy, is an unincorporated community in the San Gabriel Mountains located in San Bernardino County and Los Angeles County in Southern California, with the county line running through the community. It is located below Mount San Antonio, commonly known as "Mount Baldy", hence its name.

The Mt Baldy School District consists of one school, Mt Baldy School, that serves students in grades K-8 in Mount Baldy, California, USA.

The Pomona Water Power Plant, built in 1892, was the first AC power plant in California. It fed electricity to the Pomona Valley, and was designated a California Historic Landmark (No.514) on November 25, 1953.

Sheep Mountain Wilderness is a wilderness area of 41,883 acres (169 km2) within the San Gabriel Mountains National Monument and managed by the Angeles National Forest. It is within Los Angeles County and San Bernardino County, southern California. The U.S. Congress passed the California Wilderness Act of 1984, which created this wilderness area and added it to the National Wilderness Preservation System. The wilderness includes Iron Mountain, an 8,007 ft (2,441 m) peak.

Ontario Peak is a 8,696 ft (2,651 m) high peak in the San Gabriel Mountains of California. Like its neighbor Cucamonga Peak, it is in the San Bernardino National Forest, and in the Cucamonga Wilderness. The peak is named for the nearby city of Ontario, about 12 mi (19 km) due south, and first appeared in the United States General Land Office Forest Atlas in 1908. The most accessible trailhead for hiking Ontario Peak is in Icehouse Canyon. Forest Service Trail 7W07 leads from here to Icehouse Saddle, from which the Ontario Peak Trail leads to the summit. This route is 13 miles (20.9 km) round trip, with 4,100 feet (1,200 m) of elevation gain.

The Bridge to Nowhere is an arch bridge that was built in 1936 north of Azusa, California, United States in the San Gabriel Mountains. It spans the East Fork of the San Gabriel River and was meant to be part of a road connecting the San Gabriel Valley with Wrightwood, California.

Telegraph Peak, is a peak of the San Gabriel Mountains, in the San Gabriel Mountains National Monument and San Bernardino County, California. With an elevation of 8,989 feet (2,740 m), it is highest point in the Cucamonga Wilderness of the San Bernardino National Forest.

Potato Mountain is a mountain near Claremont, California at the southern edge of the San Gabriel Mountains. It is one of the first mountains visitors encounter entering the Angeles National Forest. Its summit is about 3,422 feet above sea level.

Timber Mountain is a peak of the San Gabriel Mountains, located in the Cucamonga Wilderness, Angeles National Forest, San Bernardino County, California.

San Antonio Dam is an embankment flood control and debris dam on San Antonio Creek in San Bernardino County, California, about 5 miles (8.0 km) north of Ontario. The dam was authorized by the Flood Control Acts of 1936 and 1938 as part of a major program to provide flood protection in the Santa Ana River system. Construction began in April 1952 and finished in May 1956. The dam controls runoff from a rugged catchment area of 27 square miles (70 km2) in the San Gabriel Mountains.The dam was built by the Los Angeles District of the U.S. Army Corps of Engineers. The dam is 3,850 feet (1,170 m) long, 160 feet (49 m) high above the foundation, and 130 feet (40 m) above the riverbed. The main embankment contains 6,050,000 cubic yards (4,630,000 m3) of material. The reservoir behind the dam is usually dry, but can fill with up to 11,880 acre-feet (14,650,000 m3) of water after large flooding events. A concrete overflow spillway on the west side prevents overtopping and drains to the San Antonio and Chino Creek channels, which were lined with concrete between 1956 and 1960 to protect against such an event.A project has been underway since 2012 to remediate seepage problems at the toe of the dam during heavy rainstorms. The dam is considered a high hazard structure.

Cucamonga Peak is one of the highest peaks of the San Gabriel Mountains in San Bernardino County, California, with a summit elevation of 8,862 feet (2,701 m). It is within the Cucamonga Wilderness of the San Bernardino National Forest. It is named after the 19th-century Mexican land grant, Rancho Cucamonga, that was below it.

San Antonio Heights is a census-designated place (CDP) in the San Bernardino County, California. It is in the northern Pomona Valley and the foothills of the San Gabriel Mountains. The population was 3,371 at the 2010 census, up from 3,122 at the 2000 census.