Acorn Drive Climb
- long (1.9 km)
- 1.2 mi
- long (1.9 km)
- of climbing (190 m)
- 623 ft
- of climbing (190 m)
- average grade
- 10.2%
- average grade
- steepest 500 m
- 12.8%
- steepest 500 m
Elevation profile
From 5,974 ft at the bottom to 6,598 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 Acorn Drive this week
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Is it safe to bike up Acorn 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. What the records show: no bike crashes were reported along the climb from 2021–2025.
Common questions about Acorn Drive
- How long and steep is the Acorn Drive climb?
- 1.2 miles (1.9 km) at 10.2% on average, climbing 623 ft (190 m) from 5,974 ft to 6,598 ft. The steepest half kilometre averages 12.8%. That makes it a Category 3 climb.
- Where does the climb start and finish?
- It starts at 34.36249, -117.63863, where Acorn Drive leaves Snow Bird Road, and ends where the road ends at 34.34858, -117.64613.
- Is Acorn 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
- Table Mountain RoadCat 3 · 1.5 mi at 7.8% · 633 ft · starts 3.2 mi away
- Angeles Crest Highway from Wild Horse Canyon RoadHC · 10 mi at 5% · 2,703 ft · starts 3.7 mi away
- Green Road from Phelan RoadCat 2 · 3.2 mi at 6.7% · 1,135 ft · starts 4.5 mi away
- Mountain RoadCat 3 · 2.3 mi at 6.4% · 778 ft · starts 6.0 mi away
- Angeles Crest Highway from Fenner Saddle Road near GlendoraCat 2 · 5.2 mi at 4.8% · 1,319 ft · starts 6.5 mi away
- Angeles Crest Highway from Fenner Saddle Road near GlendoraCat 3 · 3.1 mi at 5% · 807 ft · starts 6.5 mi away
- Lone Pine Canyon RoadHC · 7.7 mi at 6.8% · 2,749 ft · starts 8.8 mi away
- Eaby RoadCat 3 · 5.3 mi at 3% · 840 ft · starts 9.1 mi away
Places to ride to 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.