Boonville Road Climb from Stipp Lane
- long (10.4 km)
- 6.4 mi
- long (10.4 km)
- of climbing (492 m)
- 1,614 ft
- of climbing (492 m)
- average grade
- 4.8%
- average grade
- steepest 500 m
- 10.5%
- steepest 500 m
Elevation profile
From 604 ft at the bottom to 2,218 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 Boonville Road this week
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Is it safe to bike up Boonville 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 Boonville Road
- How long and steep is the Boonville Road from Stipp Lane climb?
- 6.4 miles (10.4 km) at 4.8% on average, climbing 1,614 ft (492 m) from 604 ft to 2,218 ft. The steepest half kilometre averages 10.5%. That makes it a Category 2 climb.
- Where does the climb start and finish?
- It starts at 39.10322, -123.20138, where Boonville Road leaves Stipp Lane, and tops out on the road at 39.0503, -123.24475.
- Is Boonville 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
- Crestview Drive from South Dora StreetCat 2 · 1.9 mi at 15.4% · 1,549 ft · starts 1.3 mi away
- Robinson Creek RoadCat 2 · 6.4 mi at 4.8% · 1,634 ft · starts 1.4 mi away
- Redwood AvenueCat 3 · 0.8 mi at 14.3% · 577 ft · starts 2.3 mi away
- McNab Ranch Road from Butler Ranch RoadCat 3 · 0.7 mi at 14.4% · 561 ft · starts 2.6 mi away
- Mill Creek Road from Mindfulness AvenueCat 2 · 5.2 mi at 6.3% · 1,739 ft · starts 2.9 mi away
- McNab Ranch Road from Feliz Creek DriveCat 3 · 2.0 mi at 8.9% · 951 ft · starts 4.3 mi away
- Feliz Creek DriveCat 2 · 3.0 mi at 9.5% · 1,519 ft · starts 4.4 mi away
- Mendo Rock RoadCat 1 · dirt · 5.6 mi at 7.4% · 2,182 ft · starts 4.4 mi away
Found from OpenStreetMap roads and USGS 3DEP elevation; ranked on shape only. Category 2: 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.