Sonoma Mtn Road Climb
- long (1.6 km)
- 1.0 mi
- long (1.6 km)
- of climbing (204 m)
- 669 ft
- of climbing (204 m)
- average grade
- 12.7%
- average grade
- steepest 500 m
- 15.2%
- steepest 500 m
Elevation profile
From 1,007 ft at the bottom to 1,677 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 Sonoma Mtn Road this week
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Is it safe to bike up Sonoma Mtn 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 Sonoma Mtn Road
- How long and steep is the Sonoma Mtn Road climb?
- 1.0 miles (1.6 km) at 12.7% on average, climbing 669 ft (204 m) from 1,007 ft to 1,677 ft. The steepest half kilometre averages 15.2%. That makes it a Category 3 climb.
- Where does the climb start and finish?
- It starts at 38.36593, -122.57357, where Sonoma Mtn Road leaves Sonoma Mountain Road, and ends where the road ends at 38.35939, -122.5756.
- Is Sonoma Mtn 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
- Sonoma Mountain Road near SonomaCat 3 · 2.6 mi at 5.4% · 755 ft · starts 1.7 mi away
- Orchard RoadCat 3 · 1.7 mi at 7.3% · 669 ft · starts 3.2 mi away
- Trinity RoadCat 2 · 3.4 mi at 7.8% · 1,414 ft · starts 3.4 mi away
- Sonoma Mountain Road from Batesole DriveCat 3 · 4.2 mi at 3.1% · 676 ft · starts 3.5 mi away
- Nelligan RoadCat 3 · 2.6 mi at 7.3% · 994 ft · starts 3.5 mi away
- Morningside Mountain Drive from Arnold DriveCat 3 · 1.8 mi at 6.6% · 636 ft · starts 3.8 mi away
- Morningside Mountain Drive from Sobre Vista RoadCat 3 · 1.0 mi at 11.3% · 623 ft · starts 3.8 mi away
- Lichau RoadCat 2 · 3.8 mi at 7.1% · 1,421 ft · starts 4.5 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.