East River Road Climb near Sonora
- long (1.5 km)
- 0.9 mi
- long (1.5 km)
- of climbing (193 m)
- 633 ft
- of climbing (193 m)
- average grade
- 13.2%
- average grade
- steepest 500 m
- 13.6%
- steepest 500 m
Elevation profile
From 1,017 ft at the bottom to 1,650 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 East River Road this week
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Is it safe to bike up East River 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 East River Road
- How long and steep is the East River Road near Sonora climb?
- 0.9 miles (1.5 km) at 13.2% on average, climbing 633 ft (193 m) from 1,017 ft to 1,650 ft. The steepest half kilometre averages 13.6%. That makes it a Category 3 climb.
- Where does the climb start and finish?
- It starts at 37.84705, -120.33401, and tops out on the road at 37.84592, -120.32745.
- Is East River 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
- Grizzly Road near SonoraCat 3 · 1.9 mi at 5.6% · 564 ft · starts 1.0 mi away
- East River Road from New Priest Grade RoadCat 3 · 1.1 mi at 9.9% · 558 ft · starts 2.5 mi away
- Golden Chain Highway from New Priest Grade RoadCat 2 · 6.3 mi at 3.6% · 1,191 ft · starts 2.6 mi away
- New Priest Grade RoadCat 1 · 7.2 mi at 5.7% · 2,178 ft · starts 2.6 mi away
- Wards Ferry Road near SonoraCat 1 · 6.9 mi at 6% · 2,201 ft · starts 2.9 mi away
- Wards Ferry Road near SonoraCat 2 · 3.5 mi at 7% · 1,289 ft · starts 2.9 mi away
- Cocoran Gray RoadCat 3 · 2.2 mi at 5.8% · 666 ft · starts 2.9 mi away
- Old Priest GradeCat 2 · 1.9 mi at 14% · 1,368 ft · starts 3.0 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.