Alta Loma Drive 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 Alta Loma Drive climb?

1.3 miles (2.1 km) at 12.6% on average, climbing 883 ft (269 m) from 617 ft to 1,499 ft. The steepest half kilometre averages 19.2%. That makes it a Category 3 climb.

Where does the climb start and finish?

It starts at 32.73424, -116.88405, where Alta Loma Drive leaves Jamul Drive, and ends where the road ends at 32.7405, -116.86651.

Is Alta Loma Drive 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.

• Lyons Valley Road from State Route 94Cat 3 · 4.2 mi at 4.2% · 932 ft · starts 1.0 mi away
• Skyline Truck TrailCat 2 · 5.4 mi at 5% · 1,430 ft · starts 1.6 mi away
• Jamul DriveCat 3 · 3.0 mi at 4.1% · 653 ft · starts 1.7 mi away
• Isla Vista RoadCat 3 · 1.1 mi at 8.8% · 528 ft · starts 2.9 mi away
• Miller Ranch Road from Millar Anita LaneCat 2 · 3.1 mi at 10.1% · 1,654 ft · starts 3.0 mi away
• Millar Ranch RoadCat 3 · 1.2 mi at 8.5% · 554 ft · starts 3.2 mi away
• State Route 94 from Campo RoadCat 3 · 4.6 mi at 3% · 728 ft · starts 3.3 mi away
• Dehesa RoadCat 3 · 5.6 mi at 3.6% · 1,047 ft · starts 3.8 mi away