Vetter Mountain Trail is a hiking trail in Los Angeles County, California. It is within San Gabriel Mountains National Monument. It is 1.2 miles long and begins at 5,386 feet altitude. Traveling the entire trail is 2.4 miles with a total elevation gain of 660 feet. The trail ends near Vetter Mountain (elevation 5,850 feet) and the Vetter Mountain Fire Lookout observation tower. There are also restrooms near the end of the trail.