Round Valley Road Climb near Corning
- long (28.5 km)
- 18 mi
- long (28.5 km)
- of climbing (1,573 m)
- 5,161 ft
- of climbing (1,573 m)
- average grade
- 5.5%
- average grade
- steepest 500 m
- 12.3%
- steepest 500 m
Elevation profile
From 863 ft at the bottom to 6,024 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 Round Valley Road this week
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Is it safe to bike up Round Valley 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 Round Valley Road
- How long and steep is the Round Valley Road near Corning climb?
- 18 miles (28.5 km) at 5.5% on average, climbing 5,161 ft (1,573 m) from 863 ft to 6,024 ft. The steepest half kilometre averages 12.3%. That makes it a Hors catégorie climb.
- Where does the climb start and finish?
- It starts at 39.84702, -122.58881, and tops out at Goat Hill at 39.82853, -122.75936.
- Is Round Valley Road paved?
- Mostly: OpenStreetMap tags 56% of the climb as paved, and the rest as dirt or gravel.
- 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
- Paskenta-Eel River RoadHC · 22 mi at 4.7% · 5,449 ft · starts 3.2 mi away
- Paskenta-Mendocino Pass RoadCat 2 · 5.4 mi at 5.6% · 1,608 ft · starts 5.0 mi away
- Digger Ridge RoadCat 1 · dirt · 2.5 mi at 16.7% · 2,169 ft · starts 5.1 mi away
- Burma Road from Elder Creek RoadHC · dirt · 6.1 mi at 8.9% · 2,871 ft · starts 8.7 mi away
- Hardin Hole Ridge RoadCat 1 · dirt · 6.7 mi at 6.2% · 2,195 ft · starts 11 mi away
- Hum Dinger RoadCat 1 · dirt · 1.8 mi at 23.3% · 2,264 ft · starts 12 mi away
- Raglin Ridge RoadHC · dirt · 12 mi at 7.7% · 4,790 ft · starts 13 mi away
- Trough Ridge-Forks Ridge RoadHC · dirt · 10 mi at 6.1% · 3,346 ft · starts 13 mi away
Found from OpenStreetMap roads and USGS 3DEP elevation; ranked on shape only. Hors catégorie: 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.