Sweetwater Springs Road Climb near Windsor

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.

How long and steep is the Sweetwater Springs Road near Windsor climb?

3.7 miles (6.0 km) at 5.1% on average, climbing 1,007 ft (307 m) from 246 ft to 1,253 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 38.5395, -122.91423, and tops out on the road at 38.55414, -122.96941.

Is Sweetwater Springs 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.

• Mount Jackson Resort RoadCat 2 · 4.4 mi at 6.5% · 1,516 ft · starts 2.0 mi away
• Sunnyside DriveCat 3 · 1.2 mi at 8.2% · 538 ft · starts 2.1 mi away
• Marigold LaneCat 3 · 0.7 mi at 13.9% · 538 ft · starts 2.2 mi away
• Mount Jackson Lookout RoadCat 3 · 1.1 mi at 10.6% · 584 ft · starts 2.8 mi away
• Mill Creek Road near HealdsburgCat 3 · 4.3 mi at 3.5% · 781 ft · starts 4.5 mi away
• Sweetwater Springs Road near HealdsburgCat 2 · 3.4 mi at 6.4% · 1,142 ft · starts 4.6 mi away
• Perinoli RoadCat 3 · 2.5 mi at 5.3% · 702 ft · starts 5.2 mi away
• Armstrong Woods RoadCat 2 · 5.5 mi at 4.6% · 1,332 ft · starts 5.4 mi away