Mill Creek Road Climb near Healdsburg

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 Mill Creek Road near Healdsburg climb?

4.3 miles (6.9 km) at 3.5% on average, climbing 781 ft (238 m) from 456 ft to 1,237 ft. The steepest half kilometre averages 15.6%. That makes it a Category 3 climb.

Where does the climb start and finish?

It starts at 38.59197, -122.96233, and ends at a gate at 38.60935, -123.01728.

Is Mill Creek 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 Lookout RoadCat 3 · 1.1 mi at 10.6% · 584 ft · starts 3.0 mi away
• Brookside Ranch RoadCat 2 · 2.8 mi at 8% · 1,194 ft · starts 3.5 mi away
• Chemise RoadCat 2 · 5.3 mi at 4.5% · 1,260 ft · starts 4.2 mi away
• Sweetwater Springs Road near WindsorCat 3 · 3.7 mi at 5.1% · 1,007 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
• Sunnyside DriveCat 3 · 1.2 mi at 8.2% · 538 ft · starts 5.7 mi away
• Marigold LaneCat 3 · 0.7 mi at 13.9% · 538 ft · starts 5.9 mi away
• Perinoli RoadCat 3 · 2.5 mi at 5.3% · 702 ft · starts 6.3 mi away