Flat Rock 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 Flat Rock Road climb?

1.8 miles (2.9 km) at 12% on average, climbing 1,129 ft (344 m) from 1,322 ft to 2,451 ft. The steepest half kilometre averages 17.4%. That makes it a Category 2 climb.

Where does the climb start and finish?

It starts at 40.09999, -123.73675, and tops out at Alderpoint Road at 40.1122, -123.72703.

Is Flat 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.

• Ross RoadCat 2 · 1.8 mi at 13.7% · 1,280 ft · starts 1.7 mi away
• Sawmill RoadCat 3 · 2.3 mi at 6.9% · 850 ft · starts 1.9 mi away
• Mahan RoadCat 2 · 1.6 mi at 12.3% · 1,056 ft · starts 2.0 mi away
• Wade RoadCat 2 · 2.2 mi at 10.6% · 1,220 ft · starts 2.2 mi away
• Clark Road from Linda LaneCat 2 · 1.9 mi at 11.6% · 1,184 ft · starts 2.3 mi away
• Alderpoint Road from Redwood DriveCat 1 · 7.8 mi at 6.3% · 2,595 ft · starts 3.2 mi away
• Blue Rock RoadCat 3 · 1.7 mi at 9.2% · 823 ft · starts 3.3 mi away
• Red Rock RoadCat 3 · 2.5 mi at 7.7% · 1,007 ft · starts 3.4 mi away