Lake Gregory Drive Climb
- long (3.5 km)
- 2.1 mi
- long (3.5 km)
- of climbing (180 m)
- 591 ft
- of climbing (180 m)
- average grade
- 5.2%
- average grade
- steepest 500 m
- 6.6%
- steepest 500 m
Elevation profile
From 4,554 ft at the bottom to 5,144 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 Lake Gregory Drive this week
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Is it safe to bike up Lake Gregory Drive?
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 Lake Gregory Drive
- How long and steep is the Lake Gregory Drive climb?
- 2.1 miles (3.5 km) at 5.2% on average, climbing 591 ft (180 m) from 4,554 ft to 5,144 ft. The steepest half kilometre averages 6.6%. That makes it a Category 3 climb.
- Where does the climb start and finish?
- It starts at 34.2424, -117.27651, where Lake Gregory Drive leaves Lake Drive, and tops out at Rim of the World Highway at 34.22833, -117.2513.
- Is Lake Gregory Drive 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
- Arosa DriveCat 3 · 1.1 mi at 9.9% · 600 ft · starts 0.9 mi away
- North Road from Lake Gregory Drive near San BernardinoCat 3 · 1.7 mi at 6.7% · 614 ft · starts 1.7 mi away
- North Road from Lake Gregory Drive near San BernardinoCat 3 · 2.0 mi at 5.3% · 568 ft · starts 1.7 mi away
- Mojave River RoadCat 3 · 1.9 mi at 5.4% · 538 ft · starts 2.9 mi away
- Sawpit Canyon RoadCat 3 · 2.1 mi at 8% · 886 ft · starts 3.7 mi away
- Old Waterman Canyon RoadCat 2 · 3.0 mi at 8.4% · 1,355 ft · starts 4.1 mi away
- State Highway 189Cat 3 · 3.3 mi at 3.6% · 630 ft · starts 4.7 mi away
- Rim of the World Highway from North Waterman Avenue near San BernardinoHC · 22 mi at 4.4% · 4,997 ft · starts 5.3 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.