San Antonio 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. The records here are also incomplete: most reports along it are filed under Upland, where only 55% of reported bike crashes have a map location, so the numbers here are too low. What the records show: 8 bike crashes were reported on or beside San Antonio Avenue along the climb from 2021–2025, 1 of them serious or fatal (1 fatal). Of the 5 where the cyclist's direction along the climb can be read, 4 were coming down and 1 going up.

How long and steep is the San Antonio Avenue climb?

5.4 miles (8.8 km) at 3.2% on average, climbing 909 ft (277 m) from 1,066 ft to 1,975 ft. The steepest half kilometre averages 7.9%. That makes it a Category 3 climb.

Where does the climb start and finish?

It starts at 34.07386, -117.66069, where San Antonio Avenue leaves North San Antonio Avenue, and tops out at San Antonio Crescent West at 34.1515, -117.66105.

Is San Antonio 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.

• North Euclid Avenue from South Euclid Avenue near UplandCat 3 · 4.6 mi at 4.1% · 997 ft · starts 1.5 mi away
• North Euclid Avenue from South Euclid Avenue near UplandCat 3 · 3.9 mi at 3.3% · 679 ft · starts 1.5 mi away
• Benson AvenueCat 3 · 3.9 mi at 3.2% · 666 ft · starts 1.5 mi away
• North Mills AvenueCat 2 · 4.7 mi at 4.5% · 1,109 ft · starts 3.5 mi away
• Hellman AvenueCat 3 · 4.5 mi at 3.5% · 823 ft · starts 3.6 mi away
• Carnelian StreetCat 3 · 3.6 mi at 4.5% · 863 ft · starts 3.8 mi away
• Archibald AvenueCat 2 · 7.3 mi at 4.1% · 1,594 ft · starts 3.9 mi away
• Padua AvenueCat 3 · 3.2 mi at 4.9% · 820 ft · starts 3.9 mi away