Parker Hill Road Climb
- long (3.8 km)
- 2.3 mi
- long (3.8 km)
- of climbing (173 m)
- 568 ft
- of climbing (173 m)
- average grade
- 4.6%
- average grade
- steepest 500 m
- 11.9%
- steepest 500 m
Elevation profile
From 269 ft at the bottom to 837 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 Parker Hill Road this week
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Is it safe to bike up Parker Hill 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. The records here are also incomplete: most reports along it are filed under Santa Rosa, where only 11% 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 Parker Hill Road
- How long and steep is the Parker Hill Road climb?
- 2.3 miles (3.8 km) at 4.6% on average, climbing 568 ft (173 m) from 269 ft to 837 ft. The steepest half kilometre averages 11.9%. That makes it a Category 3 climb.
- Where does the climb start and finish?
- It starts at 38.47187, -122.70328, where Parker Hill Road leaves Chanate Road, and tops out on the road at 38.49448, -122.70253.
- Is Parker Hill 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
- Fountaingrove Parkway from Montecito BoulevardCat 3 · 2.1 mi at 5.6% · 627 ft · starts 1.2 mi away
- Fountaingrove Parkway near Santa RosaCat 3 · 2.2 mi at 6% · 702 ft · starts 1.3 mi away
- Fountaingrove Parkway from Mendocino OvercrossingCat 3 · 2.4 mi at 5.9% · 738 ft · starts 1.4 mi away
- Rolling Oaks DriveCat 3 · 1.4 mi at 10% · 722 ft · starts 2.0 mi away
- Skyfarm Drive from Split Rail CourtCat 3 · 0.9 mi at 12.7% · 623 ft · starts 2.6 mi away
- Calistoga Road from Firestone PlaceCat 3 · 2.8 mi at 4.3% · 643 ft · starts 2.7 mi away
- Foothill Ranch RoadCat 3 · 2.0 mi at 7.7% · 820 ft · starts 2.7 mi away
- Crystal DriveCat 3 · 1.5 mi at 8.6% · 676 ft · starts 3.2 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.