Primrose Drive Climb
- long (4.0 km)
- 2.5 mi
- long (4.0 km)
- of climbing (297 m)
- 974 ft
- of climbing (297 m)
- average grade
- 7.4%
- average grade
- steepest 500 m
- 13.8%
- steepest 500 m
Elevation profile
From 1,522 ft at the bottom to 2,497 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 Primrose Drive this week
Loading forecast…
Is it safe to bike up Primrose Drive?
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 Willits, where only 50% of reported bike crashes have a map location, so the numbers here are too low. What the records show: no bike crashes were reported along the climb from 2021–2025.
Common questions about Primrose Drive
- How long and steep is the Primrose Drive climb?
- 2.5 miles (4.0 km) at 7.4% on average, climbing 974 ft (297 m) from 1,522 ft to 2,497 ft. The steepest half kilometre averages 13.8%. That makes it a Category 3 climb.
- Where does the climb start and finish?
- It starts at 39.4301, -123.38135, and tops out at Ridge Road at 39.42265, -123.40938.
- Is Primrose Drive 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
- Buckeye RoadCat 3 · 1.5 mi at 8.8% · 709 ft · starts 0.3 mi away
- Goose RoadCat 3 · 1.1 mi at 11.5% · 689 ft · starts 0.9 mi away
- Perch DriveCat 3 · 1.1 mi at 10.2% · 574 ft · starts 1.3 mi away
- Sherwood RoadCat 3 · 1.9 mi at 5.5% · 561 ft · starts 1.4 mi away
- Bear DriveCat 3 · 1.3 mi at 11.2% · 741 ft · starts 1.7 mi away
- Canyon Road near WillitsCat 3 · 3.1 mi at 3.8% · 614 ft · starts 3.4 mi away
- Hearst Willits RoadCat 3 · 1.6 mi at 7.9% · 666 ft · starts 3.7 mi away
- Buckhorn RoadCat 3 · 1.0 mi at 10.6% · 571 ft · starts 3.9 mi away
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.