Adamsville 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 Adamsville Avenue climb?

1.0 miles (1.5 km) at 10.9% on average, climbing 545 ft (166 m) from 1,152 ft to 1,696 ft. The steepest half kilometre averages 12.1%. That makes it a Category 3 climb.

Where does the climb start and finish?

It starts at 34.13676, -118.61839, where Adamsville Avenue leaves Eddingham Avenue, and tops out at Summit To Summit Motorway at 34.12559, -118.61324.

Is Adamsville 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.

• Greenleaf Canyon RoadCat 3 · 1.8 mi at 7.6% · 725 ft · starts 3.0 mi away
• Topanga Canyon Boulevard from Calvert StreetCat 3 · 3.9 mi at 3.3% · 666 ft · starts 3.1 mi away
• Old Topanga Canyon RoadCat 3 · 3.9 mi at 3.7% · 748 ft · starts 3.1 mi away
• Stunt RoadCat 2 · 3.9 mi at 6.4% · 1,335 ft · starts 3.4 mi away
• Fernwood Pacific DriveCat 2 · 2.9 mi at 7.2% · 1,089 ft · starts 3.8 mi away
• Grand View DriveCat 3 · 1.1 mi at 9.7% · 554 ft · starts 3.9 mi away
• Winnetka AvenueCat 3 · 2.5 mi at 5.1% · 666 ft · starts 4.2 mi away
• Saddle Peak RoadCat 3 · 2.3 mi at 5% · 614 ft · starts 4.8 mi away