Aborn Road Climb
- long (3.5 km)
- 2.2 mi
- long (3.5 km)
- of climbing (252 m)
- 827 ft
- of climbing (252 m)
- average grade
- 7.2%
- average grade
- steepest 500 m
- 12.2%
- steepest 500 m
Elevation profile
From 233 ft at the bottom to 1,060 ft at the top. Grades are averaged over each half kilometre, from USGS elevation data, so short ramps can be steeper than they show.
Weather at the top of Aborn Road this week
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Is it safe to bike up Aborn Road?
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 San Jose, where only 28% 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 Aborn Road along the climb from 2021–2025.
Common questions about Aborn Road
- How long and steep is the Aborn Road climb?
- 2.2 miles (3.5 km) at 7.2% on average, climbing 827 ft (252 m) from 233 ft to 1,060 ft. The steepest half kilometre averages 12.2%. That makes it a Category 3 climb.
- Where does the climb start and finish?
- It starts at 37.31536, -121.78186, where Aborn Road leaves Montelena Drive, and ends where the road ends at 37.32242, -121.75078.
- Is Aborn Road 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.
Other climbs nearby
- Quimby Road from Davidwood WayCat 2 · 4.6 mi at 8.3% · 2,021 ft · starts 0.8 mi away
- San Felipe RoadCat 3 · 5.4 mi at 3.2% · 922 ft · starts 1.3 mi away
- Higuera RoadCat 3 · 1.7 mi at 6.7% · 614 ft · starts 1.9 mi away
- Higuera Highland LaneCat 3 · 1.2 mi at 13.4% · 860 ft · starts 2.1 mi away
- Clayton RoadCat 3 · 4.0 mi at 4.3% · 922 ft · starts 3.2 mi away
- Quimby Road from Mount Hamilton RoadCat 3 · 1.1 mi at 8.9% · 535 ft · starts 3.8 mi away
- Mount Hamilton Road near San JoseCat 3 · 3.1 mi at 4.6% · 758 ft · starts 4.0 mi away
- Mount Hamilton Road from Alum Rock AvenueCat 2 · 6.0 mi at 4.7% · 1,496 ft · starts 5.1 mi away
Places to ride to nearby
Bike crash hotspots nearby
Found from OpenStreetMap roads and USGS 3DEP elevation; ranked on shape only. Category 3: 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. Crashes: bike crashes reported within 100 ft of the climb, 2021–2025, from the California Crash Reporting System (CCRS), counted only where the report has map coordinates. Weather: National Weather Service. Access from OpenStreetMap tags; obey posted signs. How the data works.