Toyon Drive 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 Toyon Drive climb?

1.1 miles (1.8 km) at 12.1% on average, climbing 712 ft (217 m) from 138 ft to 850 ft. The steepest half kilometre averages 13%. That makes it a Category 3 climb.

Where does the climb start and finish?

It starts at 38.61411, -122.82959, where Toyon Drive leaves Rio Lindo Avenue, and ends at a gate at 38.61456, -122.81656.

Is Toyon Drive 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.

• Perinoli RoadCat 3 · 2.5 mi at 5.3% · 702 ft · starts 1.8 mi away
• Pine Flat Road near HealdsburgHC · 11 mi at 5% · 2,940 ft · starts 4.5 mi away
• Geysers Road near HealdsburgCat 2 · 6.8 mi at 5.8% · 2,093 ft · starts 5.1 mi away
• Brookside Ranch RoadCat 2 · 2.8 mi at 8% · 1,194 ft · starts 5.4 mi away
• Chemise RoadCat 2 · 5.3 mi at 4.5% · 1,260 ft · starts 5.9 mi away
• Sweetwater Springs Road near WindsorCat 3 · 3.7 mi at 5.1% · 1,007 ft · starts 6.9 mi away
• Mill Creek Road near HealdsburgCat 3 · 4.3 mi at 3.5% · 781 ft · starts 7.3 mi away
• Mc Donald RoadCat 3 · 1.7 mi at 8.1% · 732 ft · starts 7.7 mi away