Alonzo Avenue Climb
- long (3.0 km)
- 1.8 mi
- long (3.0 km)
- of climbing (192 m)
- 630 ft
- of climbing (192 m)
- average grade
- 6.5%
- average grade
- steepest 500 m
- 12.1%
- steepest 500 m
Elevation profile
From 810 ft at the bottom to 1,440 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 Alonzo Avenue this week
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Is it safe to bike up Alonzo Avenue?
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. The records here are also incomplete: most reports along it are filed under Los Angeles, where only 3% of reported bike crashes have a map location, so the numbers here are too low. What the records show: no bike crashes were reported along the climb from 2021–2025.
Common questions about Alonzo Avenue
- How long and steep is the Alonzo Avenue climb?
- 1.8 miles (3.0 km) at 6.5% on average, climbing 630 ft (192 m) from 810 ft to 1,440 ft. The steepest half kilometre averages 12.1%. That makes it a Category 3 climb.
- Where does the climb start and finish?
- It starts at 34.15998, -118.52068, where Alonzo Avenue leaves Palora Street, and ends where the road ends at 34.13828, -118.52677.
- Is Alonzo Avenue 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
- Reseda Boulevard from Mecca Avenue / Reseda BoulevardCat 3 · 2.7 mi at 5.7% · 814 ft · starts 1.0 mi away
- Escalon DriveCat 3 · 1.1 mi at 10.1% · 600 ft · starts 1.7 mi away
- Encino Hills DriveCat 3 · 0.9 mi at 11.7% · 571 ft · starts 2.0 mi away
- Winnetka AvenueCat 3 · 2.5 mi at 5.1% · 666 ft · starts 3.3 mi away
- Mulholland DriveCat 3 · 3.8 mi at 3.6% · 732 ft · starts 3.5 mi away
- Beverly Glen BoulevardCat 3 · 1.7 mi at 6% · 541 ft · starts 4.3 mi away
- Topanga Canyon Boulevard from Calvert StreetCat 3 · 3.9 mi at 3.3% · 666 ft · starts 5.1 mi away
- Dixie Canyon AvenueCat 3 · 2.0 mi at 5.1% · 548 ft · starts 5.6 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.