Frost Lane 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 Frost Lane climb?

0.8 miles (1.3 km) at 14.4% on average, climbing 610 ft (186 m) from 335 ft to 945 ft. The steepest half kilometre averages 17.9%. That makes it a Category 3 climb.

Where does the climb start and finish?

It starts at 40.28252, -123.84247, where Frost Lane leaves Elk Creek Road, and tops out on the road at 40.27706, -123.84207.

Is Frost Lane 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.

• Elk Creek RoadCat 3 · 2.7 mi at 6.5% · 948 ft · starts 0.6 mi away
• Dyerville Loop Road near Rio DellCat 2 · 4.1 mi at 5.2% · 1,112 ft · starts 1.5 mi away
• Cathey RoadCat 3 · 1.7 mi at 11.2% · 1,004 ft · starts 2.0 mi away
• Sequoia RoadCat 3 · 1.6 mi at 10.7% · 915 ft · starts 2.6 mi away
• Dyerville Loop Road near Rio DellCat 2 · 2.2 mi at 9.2% · 1,083 ft · starts 2.9 mi away
• Somerville RoadCat 2 · 1.8 mi at 11.8% · 1,106 ft · starts 3.0 mi away
• Whitlow Road near Rio DellCat 3 · 3.2 mi at 5.6% · 955 ft · starts 3.1 mi away
• Whitlow Road near Rio DellCat 3 · 1.0 mi at 14.3% · 722 ft · starts 3.2 mi away