Weir Canyon Road Climb

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: no bike crashes were reported along the climb from 2021–2025.

How long and steep is the Weir Canyon Road climb?

2.6 miles (4.2 km) at 4.1% on average, climbing 571 ft (174 m) from 348 ft to 919 ft. The steepest half kilometre averages 9.5%. That makes it a Category 3 climb.

Where does the climb start and finish?

It starts at 33.87339, -117.74676, where Weir Canyon Road leaves Yorba Linda Boulevard, and tops out at East Shining Star Court at 33.84984, -117.72889.

Is Weir 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.

• South Serrano AvenueCat 3 · 1.2 mi at 8.1% · 525 ft · starts 1.0 mi away
• Camino de BryantCat 3 · 1.6 mi at 7.6% · 650 ft · starts 2.2 mi away
• Eucalyptus AvenueCat 3 · 2.7 mi at 4% · 568 ft · starts 8.1 mi away
• Maple Springs RoadHC · 13 mi at 5.1% · 3,530 ft · starts 9.6 mi away
• Rimpau AvenueCat 3 · 3.7 mi at 3.1% · 600 ft · starts 11 mi away
• Fullerton AvenueCat 3 · 2.8 mi at 3.8% · 568 ft · starts 11 mi away
• North Harbor BoulevardCat 3 · 2.3 mi at 5.6% · 673 ft · starts 11 mi away
• Lemon AvenueCat 3 · 2.4 mi at 5.1% · 656 ft · starts 12 mi away