| Official Name: | Mt Baldy, California |
| Pushpin Map: | Los Angeles#California#USA |
| Pushpin Map Caption: | Location within the Los Angeles Metropolitan Area##Location within the State of California##Location within the contiguous United States |
| Pushpin Label: | Mount Baldy |
| Subdivision Type: | Country |
| Subdivision Name: |  United States |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | San Bernardino Los Angeles |
| Timezone: | Pacific (PST) |
| Utc Offset: | -8 |
| Timezone Dst: | PDT |
| Utc Offset Dst: | -7 |
| Elevation Ft: | 4193 |
| Coordinates: | 34.2361°N -117.66°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 91759 |
| Area Code: | 909 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1660300 |
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.
It is located below Mount San Antonio (Mt Baldy) in San Antonio Canyon. San Antonio Creek flows through the community. It is surrounded by Angeles National Forest. Mt Baldy is 12miles north of Ontario.
Around the turn of the twentieth century, when the Baldy Bowl was transitioning from resource extraction and toward recreation, a series of bitter conflicts took place there between the San Antonio Water Company and various camp owners. Pollution of the watershed and an 1899 brush fire led the company to wrest legal control of the road through the canyon away from Charles Baynham, close off the canyon with locked gates, and station armed guards to keep out intruders. But after some time and various legal battles, the company decided to profit from recreation rather than discouraging it. It bought Baynham's Camp in 1907 but then hired Baynham to manage it, charging tolls on the road from 1908 to 1922. The camp was renamed Camp Baldy in 1910, and in the following year the canyon became accessible by automobile.[1] By the early 1920s there were numerous trail camps and resorts in the area. When the area became a national forest in 1908, the forest service began offering 99-year leases of plots of land, including at Camp Baldy.
The Los Angeles flood of 1938 destroyed most of the human-made structures in Camp Baldy.[2] The casino was destroyed, but the hotel (today's Buckhorn Lodge) survived.[3] Camp Baldy was rebuilt and later became Mt. Baldy Village.
Mt Baldy has a post office with ZIP code 91759.[4] The community was established as Camp Baynham in 1906; it changed its name to Camp Baldy in 1910 and became Mt Baldy in 1951. Its post office was established in 1913.[5]
The Mt Baldy School District operates the Mt Baldy School in town. The Mt Baldy Zen Center is located in the area.
The Mt Baldy Ski Lifts are above the town on the slopes of Mt Baldy.
The town of Mount Baldy is served by privately-owned utilities. Public services are by county and state governments.
Mt. Baldy is located in California's 8th congressional district, represented by Republican Jay Obernolte.
Gas is propane, as no natural gas lines are available.
Mt Baldy has relatively cold and very wet winters with moderate snowfall. Temperatures often fall to 30F at night. It is usually 39F49F during the day during the winter, and 25–35 °F at night. Annual snowfall is about 42inches. Summer temperatures are mild to warm, and can get chilly at night. Daytime temperatures are 76F86F, with lows of 49F62F. Thunderstorms are not common, on occasion they brew in the mountains in and surrounding Mt Baldy. They usually occur in the afternoon, and clear up by late evening.