Chamisal Pass Climb from Boar Run

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 Chamisal Pass from Boar Run climb?

5.7 miles (9.1 km) at 6.5% on average, climbing 1,952 ft (595 m) from 144 ft to 2,096 ft. The steepest half kilometre averages 14.7%. That makes it a Category 2 climb.

Where does the climb start and finish?

It starts at 36.52138, -121.86351, where Chamisal Pass leaves Boar Run, and tops out on the road at 36.47239, -121.81207.

Is Chamisal Pass 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.

• Rancho San Carlos RoadCat 2 · 4.1 mi at 5.6% · 1,204 ft · starts 1.0 mi away
• Cabrillo Highway from Rio RoadCat 3 · 2.0 mi at 5.2% · 558 ft · starts 2.9 mi away
• Tierra Grande DriveCat 3 · 2.1 mi at 7.8% · 846 ft · starts 2.9 mi away
• Robinson Canyon RoadCat 2 · 8.7 mi at 3.6% · 1,654 ft · starts 3.0 mi away
• Red Wolf DriveCat 2 · 2.0 mi at 11.7% · 1,240 ft · starts 3.9 mi away
• Corona RoadCat 2 · 2.3 mi at 11.6% · 1,401 ft · starts 4.2 mi away
• Aguajito RoadCat 3 · 2.8 mi at 4.6% · 673 ft · starts 4.7 mi away
• South Boundary RoadCat 3 · 3.4 mi at 3.9% · 712 ft · starts 5.1 mi away