Summit Avenue 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 Summit Avenue climb?

1.6 miles (2.6 km) at 7.9% on average, climbing 676 ft (206 m) from 138 ft to 814 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 37.90638, -122.55243, where Summit Avenue leaves Lovell Avenue, and tops out at Fern Canyon Road at 37.92006, -122.56236.

Is Summit Avenue 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.

• Glen Fr RoadCat 3 · 2.0 mi at 7% · 722 ft · starts 0.7 mi away
• Countyview DriveCat 3 · 0.9 mi at 13.9% · 630 ft · starts 2.5 mi away
• Shoreline Highway near SausalitoCat 3 · 3.2 mi at 3.5% · 594 ft · starts 2.6 mi away
• Evergreen DriveCat 3 · 1.4 mi at 11.8% · 869 ft · starts 2.9 mi away
• Muir Woods RoadCat 3 · 3.7 mi at 3.5% · 692 ft · starts 3.0 mi away
• Goodhill RoadCat 3 · 1.6 mi at 8% · 673 ft · starts 3.1 mi away
• Shoreline Highway from Pacific WayCat 3 · 2.0 mi at 5.6% · 600 ft · starts 3.1 mi away
• Oak AvenueCat 3 · 1.2 mi at 9.4% · 571 ft · starts 4.3 mi away