Trinity Highway Climb near Blue Lake
- long (9.9 km)
- 6.2 mi
- long (9.9 km)
- of climbing (533 m)
- 1,749 ft
- of climbing (533 m)
- average grade
- 5.4%
- average grade
- steepest 500 m
- 8.1%
- steepest 500 m
Elevation profile
From 528 ft at the bottom to 2,277 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 Trinity Highway this week
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Is it safe to bike up Trinity Highway?
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 Trinity Highway
- How long and steep is the Trinity Highway near Blue Lake climb?
- 6.2 miles (9.9 km) at 5.4% on average, climbing 1,749 ft (533 m) from 528 ft to 2,277 ft. The steepest half kilometre averages 8.1%. That makes it a Category 2 climb.
- Where does the climb start and finish?
- It starts at 40.91224, -123.91622, and tops out at Lord-Ellis Summit at 40.93091, -123.86196.
- Is Trinity Highway 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
- Bald Mountain Road from Maple Creek RoadCat 2 · 6.0 mi at 4.9% · 1,552 ft · starts 3.7 mi away
- Maple Creek Road near Blue LakeCat 2 · 2.5 mi at 8.3% · 1,115 ft · starts 3.7 mi away
- Liscom Hill Road near Blue LakeCat 2 · 4.1 mi at 6.8% · 1,460 ft · starts 3.9 mi away
- Maple Creek Road near Blue LakeCat 3 · 3.3 mi at 3.3% · 568 ft · starts 4.7 mi away
- Acorn LaneCat 3 · 1.6 mi at 10.8% · 886 ft · starts 4.9 mi away
- Liscom Hill Road from Glendale DriveCat 3 · 1.7 mi at 9.5% · 860 ft · starts 4.9 mi away
- Bair Road near Blue LakeCat 2 · 3.6 mi at 6.7% · 1,250 ft · starts 5.4 mi away
- Old California State Route 299 from Chezum Road near Blue LakeCat 3 · 1.6 mi at 7.1% · 587 ft · starts 5.4 mi away
Bike crash hotspots nearby
Found from OpenStreetMap roads and USGS 3DEP elevation; ranked on shape only. Category 2: 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.