Telegraph Peak

Telegraph Peak rises to about 9,000 feet in the San Gabriel Mountains and displays steep slopes with natural ridge lines that shape the landscape. Various trails cross through the terrain and ascend through different elevation zones in the Cucamonga Wilderness area.

The mountain received its current name in the 1890s, replacing the former designation Heliograph Hill, which referred to mirror-based communication methods. This name change reflects how communication technology evolved in the region during that period.

The peak is part of a popular three-summit circuit that hikers use to explore multiple mountains in one outing. The route connects different peaks together and gives visitors the chance to reach several summits during a single day trip.

Visitors need a National Forest Adventure Pass and a wilderness permit to reach the summit, both available at Mount Baldy Village Visitor Center. It helps to gather required paperwork in advance since this simplifies access and prevents delays upon arrival.

On clear days, the summit offers far-reaching views of distant landmarks like Lytle Creek Drainage, Cajon Pass, Mount Baldy, and Mount Harwood. These expansive sightlines make it an excellent vantage point for those wanting to experience the breadth of surrounding geography.

Location: California

GPS coordinates: 34.26174,-117.59840

Latest update: December 14, 2025 12:21