Splinter Road Climb
- long (1.5 km)
- 1.0 mi
- long (1.5 km)
- of climbing (221 m)
- 725 ft
- of climbing (221 m)
- average grade
- 14.3%
- average grade
- steepest 500 m
- 18.2%
- steepest 500 m
Elevation profile
From 200 ft at the bottom to 925 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 Splinter Road this week
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Is it safe to bike up Splinter 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 Splinter Road
- How long and steep is the Splinter Road climb?
- 1.0 miles (1.5 km) at 14.3% on average, climbing 725 ft (221 m) from 200 ft to 925 ft. The steepest half kilometre averages 18.2%. That makes it a Category 3 climb.
- Where does the climb start and finish?
- It starts at 40.84729, -124.04683, where Splinter Road leaves Idyle Bear Lane, and tops out at Simmons Lane at 40.85173, -124.03641.
- Is Splinter 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
- Fickle Hill Road from Park AvenueCat 3 · 2.1 mi at 6.7% · 748 ft · starts 1.9 mi away
- Fickle Hill Road near ArcataCat 3 · 4.1 mi at 4% · 853 ft · starts 2.4 mi away
- Garden LaneCat 3 · 0.9 mi at 16% · 761 ft · starts 2.9 mi away
- Liscom Hill Road from Glendale DriveCat 3 · 1.7 mi at 9.5% · 860 ft · starts 4.0 mi away
- Greenwood Heights DriveCat 2 · 6.5 mi at 5.8% · 1,978 ft · starts 4.5 mi away
- Maple Creek Road near Blue LakeCat 2 · 2.5 mi at 8.3% · 1,115 ft · starts 4.7 mi away
- Liscom Hill Road near Blue LakeCat 2 · 4.1 mi at 6.8% · 1,460 ft · starts 4.8 mi away
- Bald Mountain Road from Maple Creek RoadCat 2 · 6.0 mi at 4.9% · 1,552 ft · starts 5.9 mi away
Bike crash hotspots 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.