Mount Umunhum Road Climb
- long (8.8 km)
- 5.4 mi
- long (8.8 km)
- of climbing (628 m)
- 2,060 ft
- of climbing (628 m)
- average grade
- 7.2%
- average grade
- steepest 500 m
- 12.1%
- steepest 500 m
Elevation profile
From 1,407 ft at the bottom to 3,468 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 Mount Umunhum Road this week
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Is it safe to bike up Mount Umunhum 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: 1 bike crash was reported on or beside Mount Umunhum Road along the climb from 2021–2025, 1 of them serious or fatal.
Common questions about Mount Umunhum Road
- How long and steep is the Mount Umunhum Road climb?
- 5.4 miles (8.8 km) at 7.2% on average, climbing 2,060 ft (628 m) from 1,407 ft to 3,468 ft. The steepest half kilometre averages 12.1%. That makes it a Category 2 climb.
- Where does the climb start and finish?
- It starts at 37.17535, -121.8636, where Mount Umunhum Road leaves Hicks Road, and tops out at Mount Umunhum at 37.16041, -121.89812.
- Is Mount Umunhum 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
- Hicks Road from Alamitos RoadCat 3 · 1.7 mi at 8.8% · 784 ft · starts 1.5 mi away
- Cinnabar Hills DriveCat 2 · 2.1 mi at 9.7% · 1,093 ft · starts 2.1 mi away
- Alamitos RoadCat 3 · 3.6 mi at 3% · 581 ft · starts 2.2 mi away
- Reynolds RoadCat 3 · 1.1 mi at 10.5% · 640 ft · starts 2.7 mi away
- Hicks Road near Los GatosCat 2 · 5.5 mi at 3.7% · 1,089 ft · starts 3.9 mi away
- Country View DriveCat 3 · 1.8 mi at 6.5% · 627 ft · starts 4.3 mi away
- Loma Prieta WayCat 3 · 1.7 mi at 6.9% · 604 ft · starts 5.2 mi away
- Wrights Station RoadCat 3 · 1.4 mi at 7.4% · 554 ft · starts 5.2 mi away
Places to ride to nearby
Bike crash hotspots nearby
Found from OpenStreetMap roads and USGS 3DEP elevation; ranked on shape only. Category 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.