Eaton Canyon is a major canyon beginning at the Eaton Saddle near Mount Markham and San Gabriel Peak in the San Gabriel Mountains in the Angeles National Forest, USA. Its drainage flows into the Rio Hondo river and then into the Los Angeles River. It is named after Judge Benjamin Eaton (not to be confused with Coloradan politician Benjamin Eaton), who lived in the Fair Oaks Ranch House in 1865 not far from Eaton Creek.

The most well-known portion of the canyon is the Eaton Canyon Nature Center in Pasadena, California. The trailhead of the Mount Wilson Toll Road is in the canyon.

Nature Center Open Daily from 9am to 5pm
except: Mondays,Thanksgiving Day, Christmas Day, and New Years Day

Park Open Daily from sunrise to sunset