Cothrin Ranch 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 Cothrin Ranch Road climb?

3.0 miles (4.8 km) at 3.9% on average, climbing 617 ft (188 m) from 499 ft to 1,115 ft. The steepest half kilometre averages 9.8%. That makes it a Category 3 climb.

Where does the climb start and finish?

It starts at 38.60084, -121.02246, where Cothrin Ranch Road leaves Latrobe Road, and tops out at Grazing Hill Road at 38.59871, -120.98753.

Is Cothrin Ranch 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.

• Holly DriveCat 3 · 2.5 mi at 4.7% · 623 ft · starts 5.2 mi away
• Beatty DriveCat 3 · 1.4 mi at 7.5% · 538 ft · starts 7.2 mi away
• Bumper RoadCat 3 · 1.2 mi at 9% · 558 ft · starts 8.3 mi away
• Sand Ridge Road from Stone Broke RoadCat 3 · 3.2 mi at 5.6% · 948 ft · starts 9.6 mi away
• State Highway 49 near PlymouthCat 3 · 5.2 mi at 3.8% · 1,043 ft · starts 9.9 mi away
• Bell RoadCat 3 · 3.4 mi at 3.9% · 705 ft · starts 10 mi away
• Union Mine RoadCat 3 · 2.0 mi at 5% · 531 ft · starts 11 mi away
• Luneman RoadCat 3 · 2.0 mi at 5.8% · 607 ft · starts 12 mi away