Poso 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 Poso Road climb?

2.9 miles (4.7 km) at 10.9% on average, climbing 1,683 ft (513 m) from 3,248 ft to 4,931 ft. The steepest half kilometre averages 16.9%. That makes it a Category 2 climb.

Where does the climb start and finish?

It starts at 35.61474, -118.6818, where Poso Road leaves Coffee Creek, and tops out at Rancheria Road at 35.60653, -118.63779.

Is Poso 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.

• Rancheria RoadCat 1 · dirt · 14 mi at 3.3% · 2,513 ft · starts 2.3 mi away
• Poso Flat RoadCat 2 · 2.5 mi at 10% · 1,302 ft · starts 2.7 mi away
• Poso Flat RoadCat 3 · 3.0 mi at 3.7% · 584 ft · starts 3.0 mi away
• Delonegha 4WD TrailCat 1 · dirt · 3.4 mi at 13.9% · 2,487 ft · starts 5.6 mi away
• Whites Mill RoadCat 1 · 5.6 mi at 7.3% · 2,146 ft · starts 5.7 mi away
• Bradshaw 4WD TrailCat 1 · dirt · 3.3 mi at 14.2% · 2,500 ft · starts 7.0 mi away
• Evans Road from Bakersfield-Glennville RoadHC · 15 mi at 3.8% · 3,140 ft · starts 7.4 mi away
• Ramel Lynn RoadCat 3 · 2.2 mi at 6.2% · 722 ft · starts 7.9 mi away