North Mountain 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: 1 bike crash was reported on or beside North Mountain Avenue along the climb from 2021–2025.

How long and steep is the North Mountain Avenue climb?

3.7 miles (6.0 km) at 3.3% on average, climbing 653 ft (199 m) from 1,886 ft to 2,539 ft. The steepest half kilometre averages 5.3%. That makes it a Category 3 climb.

Where does the climb start and finish?

It starts at 34.14326, -117.67048, where North Mountain Avenue leaves Mountain Avenue, and tops out at Mount Baldy Road at 34.17511, -117.67653.

Is North Mountain 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.

• Mount Baldy RoadHC · 13 mi at 7.4% · 5,256 ft · starts 2.1 mi away
• Padua AvenueCat 3 · 3.2 mi at 4.9% · 820 ft · starts 2.2 mi away
• Sapphire StreetCat 3 · 2.0 mi at 5.3% · 564 ft · starts 2.7 mi away
• Gale TrailCat 3 · 0.8 mi at 13.4% · 538 ft · starts 2.8 mi away
• North Mills AvenueCat 2 · 4.7 mi at 4.5% · 1,109 ft · starts 3.3 mi away
• North Euclid Avenue from South Euclid Avenue near UplandCat 3 · 4.6 mi at 4.1% · 997 ft · starts 3.6 mi away
• North Euclid Avenue from South Euclid Avenue near UplandCat 3 · 3.9 mi at 3.3% · 679 ft · starts 3.6 mi away
• Beryl StreetCat 3 · 3.3 mi at 4.3% · 755 ft · starts 3.8 mi away