San Gabriel Canyon Road Climb from Ranch 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. The records here are also incomplete: most reports along it are filed under Azusa, where only 62% of reported bike crashes have a map location, so the numbers here are too low. What the records show: 3 bike crashes were reported on or beside San Gabriel Canyon Road along the climb from 2021–2025, 2 of them serious or fatal (1 fatal). Of the 3 where the cyclist's direction along the climb can be read, 2 were coming down and 1 going up.

How long and steep is the San Gabriel Canyon Road from Ranch Road climb?

3.3 miles (5.4 km) at 3.4% on average, climbing 591 ft (180 m) from 751 ft to 1,342 ft. The steepest half kilometre averages 6%. That makes it a Category 3 climb.

Where does the climb start and finish?

It starts at 34.15937, -117.90971, where San Gabriel Canyon Road leaves Ranch Road, and tops out on the road at 34.18403, -117.87356.

Is San Gabriel Canyon 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.

• Van Tassel MotorwayHC · 4.6 mi at 12.1% · 2,927 ft · starts 1.2 mi away
• Monrovia Canyon Truck TrailHC · dirt · 6.6 mi at 8.2% · 2,851 ft · starts 4.0 mi away
• Glendora Mountain Road from Elmgrove DriveCat 1 · 9.7 mi at 4.9% · 2,520 ft · starts 4.2 mi away
• Rincon Red Box Truck TrailHC · dirt · 12 mi at 5.3% · 3,232 ft · starts 6.1 mi away
• San Gabriel Canyon Road from West Fork TrailHC · 11 mi at 6.1% · 3,648 ft · starts 6.1 mi away
• Santa Anita Canyon RoadCat 2 · 3.3 mi at 6.9% · 1,207 ft · starts 7.0 mi away
• Upper Monroe Truck TrailCat 1 · dirt · 7.2 mi at 5.5% · 2,110 ft · starts 7.4 mi away
• Glendora Ridge RoadCat 2 · 5.4 mi at 4.3% · 1,214 ft · starts 8.7 mi away