Half Moon Bay Road Climb
- long (3.0 km)
- 1.9 mi
- long (3.0 km)
- of climbing (172 m)
- 564 ft
- of climbing (172 m)
- average grade
- 5.8%
- average grade
- steepest 500 m
- 6.5%
- steepest 500 m
Elevation profile
From 299 ft at the bottom to 863 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 Half Moon Bay Road this week
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Is it safe to bike up Half Moon Bay 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: 2 bike crashes were reported on or beside Half Moon Bay Road along the climb from 2021–2025.
Common questions about Half Moon Bay Road
- How long and steep is the Half Moon Bay Road climb?
- 1.9 miles (3.0 km) at 5.8% on average, climbing 564 ft (172 m) from 299 ft to 863 ft. The steepest half kilometre averages 6.5%. That makes it a Category 3 climb.
- Where does the climb start and finish?
- It starts at 37.50992, -122.35128, and tops out at San Mateo Road at 37.49559, -122.36886.
- Is Half Moon Bay 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
- Skyline Boulevard from San Mateo RoadCat 2 · 8.0 mi at 3.5% · 1,473 ft · starts 1.4 mi away
- San Mateo Road near Half Moon BayCat 3 · 1.8 mi at 6.8% · 627 ft · starts 2.2 mi away
- Hayne RoadCat 3 · 2.2 mi at 4.9% · 558 ft · starts 3.6 mi away
- Club DriveCat 3 · 1.3 mi at 8.7% · 600 ft · starts 3.6 mi away
- Ralston Avenue from Old County RoadCat 3 · 2.8 mi at 4.1% · 594 ft · starts 4.2 mi away
- Ralston Avenue from Elm AvenueCat 3 · 2.3 mi at 4.8% · 581 ft · starts 4.3 mi away
- Skyfarm Drive from Redington RoadCat 3 · 1.3 mi at 7.8% · 551 ft · starts 4.4 mi away
- Crestview Drive from Bow DriveCat 3 · 1.2 mi at 9.9% · 610 ft · starts 4.4 mi away
Places to ride to nearby
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.