Chimney Rock Road Climb near Healdsburg

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 Chimney Rock Road near Healdsburg climb?

1.2 miles (1.9 km) at 12.5% on average, climbing 778 ft (237 m) from 138 ft to 915 ft. The steepest half kilometre averages 17.2%. That makes it a Category 3 climb.

Where does the climb start and finish?

It starts at 38.50653, -123.03475, and ends where the road ends at 38.50033, -123.04366.

Is Chimney Rock 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.

• Old Cazadero Road near HealdsburgCat 3 · 4.4 mi at 4.3% · 1,014 ft · starts 1.0 mi away
• Siri RoadCat 3 · 0.6 mi at 15.7% · 525 ft · starts 1.4 mi away
• Gabes Rock RoadCat 3 · 1.2 mi at 9.5% · 620 ft · starts 1.7 mi away
• Old Cazadero Road from Scanlon RoadCat 3 · 1.3 mi at 11.1% · 741 ft · starts 1.7 mi away
• Redwood Heights DriveCat 3 · 0.5 mi at 22.9% · 623 ft · starts 1.8 mi away
• Armstrong Woods RoadCat 2 · 5.5 mi at 4.6% · 1,332 ft · starts 1.9 mi away
• Pole Mountain RoadCat 3 · 1.4 mi at 10.8% · 787 ft · starts 1.9 mi away
• Scanlon RoadCat 3 · 0.8 mi at 12.7% · 568 ft · starts 2.0 mi away