Mount Islip, Mountain summit in the San Gabriel Mountains, California, United States

Mount Islip rises to 8,250 feet within the San Gabriel Mountains and offers views of the Mojave Desert and the Los Angeles Basin. The summit is accessible via multiple hiking routes, including the path from the Islip Saddle parking area.

The peak is named for George Islip, a homesteader who lived in the surrounding area in the late 19th century. In 1927 a steel fire lookout tower was built on the summit; a rock cabin from the lookout site still stands near the top.

The peak is named for George Islip, a homesteader who lived in the surrounding area in the late 19th century. Hikers today still use the name he left on the mountain, and the rock cabin near the summit is a remnant of the 1927 steel fire lookout tower that once stood there.

The hike offers varying difficulty levels and can take anywhere from a few hours to a full day depending on the route chosen. Camping facilities are available nearby, including Little Jimmy Campground, for visitors who wish to stay overnight during extended trips.

The rock cabin near the summit is what remains of the steel fire lookout tower built on Mount Islip in 1927. The peak itself is named for George Islip, a homesteader who lived in the surrounding area in the late 19th century.