Glendora Mountain Road
Weekday afternoons are the move. Weekend mornings the road fills with cyclists grinding up the grade, and the blind corners turn slow and tense. CHP patrol it and they write tickets. Drivers regroup near the Glendora Ridge Road junction. The Dalton gate at the bottom closes after rockfall and storms, so check it’s open before you head up.
Public mountain road (GMR) climbing from Glendora into the Angeles National Forest, linking to Glendora Ridge Road and the East Fork. Free, but gated and closed seasonally.
Clear, dry days; early mornings before traffic and heat. Upper stretches can close for snow or fire.
Popular with cyclists, motorcyclists, and drivers; regularly patrolled by CHP and forest officers.
Narrow, with no center line in places, blind curves, rockfall, and sheer unguarded drop-offs. Check Angeles National Forest and Caltrans for closures before going.
Twelve miles of switchbacks climbing out of Glendora into the San Gabriel foothills. Smooth pavement, sightlines you can trust, and the kind of low traffic that earned it its reputation. Cyclists own weekend mornings. Sheriffs run it visibly. The afternoon weekday window is what regulars actually shoot for.
