Panorama of the San Gabriel Range looking east to Mt. BaldyDistance: 4.2 MilesElevation Gained: 1,600'Difficulty: Moderately StrenuousTime: 2:30Directions to the trailheadNote: Don't forget your National Forest Adventure PassDetails:Red Box Canyon from the TrailheadThe Front Range of the San Gabriel Mountains looms like a massive, green wall over the cities of the San Gabriel Valley. This …