Echo Mountain, Mountain summit in San Gabriel Mountains, California.
Echo Mountain is a summit in the San Gabriel Mountains rising above Altadena with steep trails running through Rubio and Las Flores canyons within the Angeles National Forest. The peak sits surrounded by pine trees and chaparral scrub, offering views across the valley below and toward distant ridges on clear days.
A railway project called the Mount Lowe Railway brought visitors to the peak in the 1890s, where a large Victorian resort complex called White City was built near the summit. The development operated for only a brief period before being abandoned, ending a short chapter of tourist activity at the location.
The peak takes its name from voice echoes that occur naturally in Castle Canyon below, where visitors were historically drawn to test the sound effects. This acoustic phenomenon made the location a popular stopping point for hikers curious about the mountain's calling card.
The main trail starts at the end of Lake Avenue and ascends through switchbacks with steep sections requiring solid footwear and good fitness. Starting early is wise to ensure you have daylight for the return trip and to avoid the hottest part of the day, especially in summer months.
Stone foundations and ruins of the old resort buildings and railway infrastructure remain visible at the summit, serving as reminders of the site's brief commercial past. Interpretive plaques scattered across the area help visitors piece together what once stood here.
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