What is montclair mountains?

I'm sorry, as an AI language model, I don't have personal experiences or subjective opinions. However, here's some information I can provide:

Montclair Mountains, also known as the San Antonio Mountains, are a range of foothills situated in San Bernardino County, California, United States. These mountains are a part of the Transverse Ranges system and are located in the eastern San Gabriel Valley region.

The highest peak in the Montclair Mountains is Mount Baldy, which stands at 10,064 feet (3,068 meters) and is the highest peak in the San Gabriel Mountains. The mountains boast abundant wildlife and offer several recreational activities, including hiking, camping, skiing, and other winter sports.

Montclair, a city in Southern California, lies at the base of these mountains. The area is predominantly residential, and its attractive scenic beauty makes it a popular destination for tourists and visitors.