Glendora Mountain Road (GMR)
San Gabriel Mountains · near Glendora · Los Angeles / SoCal
Road Cycling
At a glance
- Distance
- long
- Best season
- Spring–fall; hot in summer; snow possible up high in winter
What is here
- Scenery
- mountain
- Amenities
- Gateway to GRR & Mt. Baldy · Long steady San Gabriel climb · Quiet weekday riding · Big front-range views
- Best for
- A long San Gabriel front-range climb
- Features
- San Gabriel climbing playground · Links to Glendora Ridge Rd & Baldy · Long, steady, view-filled ascent · Quiet mountain road
Worth knowing
- Hazards
- 2024 BRIDGE FIRE: upper GMR & Glendora Ridge Rd saw closures into 2025–26 — check current Angeles NF / LA County status · Long, exposed climb — heat & sun · Canyon traffic & motorcycles on weekends · Rockfall & rough patches after storms
- Beginner friendly
- No
Road Cycling detail
- Ride types
- climb
- Road
- quiet
- Climbing
- 5
- Ride notes
- A San Gabriel Mountains climbing playground — GMR climbs steadily out of Glendora into the front range, linking to Glendora Ridge Road and onward toward Mt. Baldy, a long, quiet, view-filled ascent beloved by LA climbers
- Stats note
- Long steady climb (~8+ mi) into the San Gabriels; links to GRR & Baldy
- Seasonal
- No
- Intl tip
- The gateway to a whole San Gabriel Mountains climbing playground — GMR climbs steadily out of foothill Glendora into the front range, then links via Glendora Ridge Rd (GRR) toward Mt. Baldy, offering big-mountain riding of almost any length on the edge of LA. Sustained rather than savage climbing, superb basin and canyon views, blissfully quiet midweek. NOTE: the September 2024 Bridge Fire burned this area, and upper GMR and Glendora Ridge Rd have had recovery closures into 2025–26 — check current Angeles NF / LA County status before planning. Exposed and hot in summer (carry water, ride early); weekend traffic and motorcyclists; rockfall and rough patches after storms.
The guide
Glendora Mountain Road, universally known to LA cyclists as GMR, is the gateway to a whole San Gabriel Mountains climbing playg…
In the Guidebook
Everything above is yours for free. The written guide to Glendora Mountain Road (GMR) — what it is actually like, and what we would tell a friend before they went — comes with the Guidebook.
Getting there
- Coordinates
- 34.18, -117.83