Four Mile Ridge Road Climb
- long (4.8 km)
- 3.0 mi
- long (4.8 km)
- of climbing (372 m)
- 1,220 ft
- of climbing (372 m)
- average grade
- 7.8%
- average grade
- steepest 500 m
- 15.6%
- steepest 500 m
Elevation profile
From 2,060 ft at the bottom to 3,281 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 Four Mile Ridge Road this week
Loading forecast…
Is it safe to bike up Four Mile Ridge 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 Four Mile Ridge Road
- How long and steep is the Four Mile Ridge Road climb?
- 3.0 miles (4.8 km) at 7.8% on average, climbing 1,220 ft (372 m) from 2,060 ft to 3,281 ft. The steepest half kilometre averages 15.6%. That makes it a Category 2 climb.
- Where does the climb start and finish?
- It starts at 39.72938, -121.35357, where Four Mile Ridge Road leaves Coyote Gap Road, and tops out at Oroville-Quincy Highway at 39.72206, -121.30733.
- Is Four Mile Ridge 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
- Merrimac RoadCat 2 · 4.6 mi at 7.3% · 1,768 ft · starts 0.5 mi away
- French Creek Road near ParadiseCat 2 · 4.5 mi at 4.6% · 1,093 ft · starts 0.8 mi away
- Big Ridge Road near ParadiseCat 3 · 2.1 mi at 7.7% · 837 ft · starts 1.6 mi away
- Bucks Lake Road from Oroville-Quincy HighwayCat 1 · 13 mi at 3.6% · 2,500 ft · starts 2.5 mi away
- Bonnie Meadow LaneCat 3 · 0.3 mi at 51.3% · 689 ft · starts 3.6 mi away
- Stump Ranch RoadCat 3 · 0.5 mi at 20.9% · 574 ft · starts 3.6 mi away
- Milsap Bar RoadCat 1 · dirt · 8.1 mi at 5.8% · 2,461 ft · starts 4.6 mi away
- Big Ridge Road near ParadiseCat 3 · 2.5 mi at 4.8% · 640 ft · starts 4.6 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.