Sam Alley Ridge Road Climb from Zablo Lane
- long (2.4 km)
- 1.5 mi
- long (2.4 km)
- of climbing (178 m)
- 584 ft
- of climbing (178 m)
- average grade
- 7.4%
- average grade
- steepest 500 m
- 9.4%
- steepest 500 m
Elevation profile
From 1,414 ft at the bottom to 1,998 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 Sam Alley Ridge Road this week
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Is it safe to bike up Sam Alley 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 Sam Alley Ridge Road
- How long and steep is the Sam Alley Ridge Road from Zablo Lane climb?
- 1.5 miles (2.4 km) at 7.4% on average, climbing 584 ft (178 m) from 1,414 ft to 1,998 ft. The steepest half kilometre averages 9.4%. That makes it a Category 3 climb.
- Where does the climb start and finish?
- It starts at 39.175, -122.87455, where Sam Alley Ridge Road leaves Zablo Lane, and ends where the road ends at 39.18517, -122.86487.
- Is Sam Alley 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
- Ladder Ridge RoadCat 3 · 1.4 mi at 13.6% · 1,004 ft · starts 0.1 mi away
- Sam Alley Ridge Road near LakeportHC · dirt · 6.5 mi at 7.7% · 2,625 ft · starts 1.1 mi away
- Clover Valley RoadCat 2 · 6.4 mi at 4.6% · 1,578 ft · starts 1.7 mi away
- Elk Mountain RoadCat 1 · 12 mi at 3.8% · 2,372 ft · starts 3.6 mi away
- Hunter Point RoadCat 2 · 3.7 mi at 7.2% · 1,401 ft · starts 4.0 mi away
- Valley View Road near LakeportCat 3 · 1.7 mi at 5.9% · 528 ft · starts 4.5 mi away
- Bartlett Springs Road near LakeportCat 1 · 6.2 mi at 7.9% · 2,589 ft · starts 5.2 mi away
- Valley View Road from Scotts Creek DriveCat 3 · 0.9 mi at 13.4% · 636 ft · starts 5.7 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.