Nelligan Road Climb
- long (4.1 km)
- 2.6 mi
- long (4.1 km)
- of climbing (303 m)
- 994 ft
- of climbing (303 m)
- average grade
- 7.3%
- average grade
- steepest 500 m
- 10.2%
- steepest 500 m
Elevation profile
From 400 ft at the bottom to 1,394 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 Nelligan Road this week
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Is it safe to bike up Nelligan 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. What the records show: no bike crashes were reported along the climb from 2021–2025.
Common questions about Nelligan Road
- How long and steep is the Nelligan Road climb?
- 2.6 miles (4.1 km) at 7.3% on average, climbing 994 ft (303 m) from 400 ft to 1,394 ft. The steepest half kilometre averages 10.2%. That makes it a Category 3 climb.
- Where does the climb start and finish?
- It starts at 38.39229, -122.51768, where Nelligan Road leaves Nuns Canyon Road, and tops out on the road at 38.42039, -122.51238.
- Is Nelligan Road paved?
- Mostly: OpenStreetMap tags 85% of the climb as paved, and the rest as dirt or gravel.
- 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
- Trinity RoadCat 2 · 3.4 mi at 7.8% · 1,414 ft · starts 0.9 mi away
- Sonoma Mountain Road near SonomaCat 3 · 2.6 mi at 5.4% · 755 ft · starts 2.3 mi away
- Orchard RoadCat 3 · 1.7 mi at 7.3% · 669 ft · starts 3.2 mi away
- Adobe Canyon RoadCat 3 · 2.9 mi at 4.7% · 732 ft · starts 3.3 mi away
- Sonoma Mtn RoadCat 3 · 1.0 mi at 12.7% · 669 ft · starts 3.5 mi away
- Morningside Mountain Drive from Arnold DriveCat 3 · 1.8 mi at 6.6% · 636 ft · starts 3.7 mi away
- Cavedale RoadCat 2 · 5.1 mi at 7.1% · 1,936 ft · starts 4.0 mi away
- Mount Veeder Road from Dry Creek RoadCat 3 · 4.0 mi at 3.7% · 791 ft · starts 4.3 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.