Kirk 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 Kirk Drive climb?

0.9 miles (1.5 km) at 11.7% on average, climbing 561 ft (171 m) from 814 ft to 1,375 ft. The steepest half kilometre averages 13.3%. That makes it a Category 3 climb.

Where does the climb start and finish?

It starts at 39.24298, -123.14314, and tops out at Black Bart Trail at 39.24319, -123.15105.

Is Kirk 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.

• Vista del Lago Road near UkiahCat 3 · 0.8 mi at 13.2% · 574 ft · starts 0.5 mi away
• Vista del Lago Road near UkiahCat 3 · 1.5 mi at 12.1% · 955 ft · starts 0.6 mi away
• Black Bart Trail near UkiahCat 3 · 1.7 mi at 7.9% · 719 ft · starts 1.0 mi away
• Black Bart Trail near UkiahCat 3 · 2.5 mi at 5.7% · 745 ft · starts 1.0 mi away
• King Ranch RoadCat 3 · 1.8 mi at 8.5% · 797 ft · starts 1.3 mi away
• Shale LaneCat 3 · 1.2 mi at 11.5% · 722 ft · starts 2.1 mi away
• Rafello DriveCat 3 · 1.8 mi at 8.8% · 833 ft · starts 3.5 mi away
• Pine AvenueCat 3 · 3.8 mi at 3.8% · 761 ft · starts 4.4 mi away