Glendora Ridge Road Climb
- long (8.7 km)
- 5.4 mi
- long (8.7 km)
- of climbing (370 m)
- 1,214 ft
- of climbing (370 m)
- average grade
- 4.3%
- average grade
- steepest 500 m
- 8.2%
- steepest 500 m
Elevation profile
From 3,297 ft at the bottom to 4,511 ft at the top. Grades are averaged over each half kilometre, from USGS elevation data, so short ramps can be steeper than they show.
Weather at the top of Glendora Ridge Road this week
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Is it safe to bike up Glendora Ridge Road?
We don't rate roads as safe or unsafe: crash counts can't say how risky a ride is, and roads people like to ride draw more riders, so they see more crashes. What the records show: 2 bike crashes were reported on or beside Glendora Ridge Road along the climb from 2021–2025.
Common questions about Glendora Ridge Road
- How long and steep is the Glendora Ridge Road climb?
- 5.4 miles (8.7 km) at 4.3% on average, climbing 1,214 ft (370 m) from 3,297 ft to 4,511 ft. The steepest half kilometre averages 8.2%. That makes it a Category 2 climb.
- Where does the climb start and finish?
- It starts at 34.21096, -117.7709, and tops out on the road at 34.22038, -117.70594.
- Is Glendora Ridge Road paved?
- Yes, by its OpenStreetMap tags.
- How is the category worked out?
- From the climb's shape only: length in metres × average grade (%) of 16,000 or more for Cat 3, 32,000 for Cat 2, 64,000 for Cat 1 and 80,000 for HC. It describes how hard the climb is, not traffic or crashes.
- Where does this data come from?
- The climb is found from OpenStreetMap roads and USGS 3DEP elevation (every climb, not a list of famous ones). Access is from OpenStreetMap tags; gates and closures change, so obey posted signs. Crash counts are police reports in the California Crash Reporting System (CCRS) on data.ca.gov, counted where their map location is within 100 ft of the climb. The forecast is from the National Weather Service.
Other climbs nearby
- Glendora Mountain Road from East Fork RoadCat 2 · 5.3 mi at 5.7% · 1,591 ft · starts 1.3 mi away
- Upper Monroe Truck TrailCat 1 · dirt · 7.2 mi at 5.5% · 2,110 ft · starts 3.4 mi away
- Rincon Red Box Truck TrailHC · dirt · 12 mi at 5.3% · 3,232 ft · starts 5.6 mi away
- Gale TrailCat 3 · 0.8 mi at 13.4% · 538 ft · starts 6.0 mi away
- San Gabriel Canyon Road from West Fork TrailHC · 11 mi at 6.1% · 3,648 ft · starts 6.0 mi away
- Glendora Mountain Road from Elmgrove DriveCat 1 · 9.7 mi at 4.9% · 2,520 ft · starts 6.2 mi away
- Mount Baldy RoadHC · 13 mi at 7.4% · 5,256 ft · starts 6.2 mi away
- North Mountain AvenueCat 3 · 3.7 mi at 3.3% · 653 ft · starts 7.4 mi away
Places to ride to nearby
Bike crash hotspots nearby
Found from OpenStreetMap roads and USGS 3DEP elevation; ranked on shape only. Category 2: length in metres × average grade (%) of 16,000 or more for Cat 3, 32,000 for Cat 2, 64,000 for Cat 1 and 80,000 for HC. It describes how hard the climb is, not traffic or crashes. Crashes: bike crashes reported within 100 ft of the climb, 2021–2025, from the California Crash Reporting System (CCRS), counted only where the report has map coordinates. Weather: National Weather Service. Access from OpenStreetMap tags; obey posted signs. How the data works.