San Gabriel Mountains Trailbuilders

The San Gabriel Mountains Trailbuilders (SGMTBs) is a 501(c)(3) non-profit volunteer organization which performs hiking and nature trail building and maintenance within the Los Angeles Gateway District[1] of the United States Forest Service which maintains the Angeles National Forest within the San Gabriel Mountains.

The organization works closely with the United States Forest Service from which the Trailbuilders volunteers get their safety oversight and general schedule for tasks and projects which are performed during the year.

Hikers, bikers, climbers, fishers, backpackers, and other people who get their recreation within the Angeles National Forest may email the Trailbuilders when there are significant problems on trails which have not yet been identified and repaired.

The SGMTB was founded in 1984 and for the past 30 years have built trails (Mount Islip, Wawona, and many others) within the Angeles National Forest.

For emergency trail hazard reporting for issues located within the Crystal Lake Recreation Area, Mount Baldy, Big Bear, East, North and West Forks of the San Gabriel River, contact the San Gabriel Mountains National Monument Office: