Trinity Lake Boulevard Climb from Mulligan Street
- long (4.2 km)
- 2.6 mi
- long (4.2 km)
- of climbing (171 m)
- 561 ft
- of climbing (171 m)
- average grade
- 4%
- average grade
- steepest 500 m
- 6.2%
- steepest 500 m
Elevation profile
From 2,024 ft at the bottom to 2,585 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 Lake Boulevard this week
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Is it safe to bike up Trinity Lake Boulevard?
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 Lake Boulevard
- How long and steep is the Trinity Lake Boulevard from Mulligan Street climb?
- 2.6 miles (4.2 km) at 4% on average, climbing 561 ft (171 m) from 2,024 ft to 2,585 ft. The steepest half kilometre averages 6.2%. That makes it a Category 3 climb.
- Where does the climb start and finish?
- It starts at 40.73313, -122.93877, where Trinity Lake Boulevard leaves Mulligan Street, and tops out at Musser Hill Road at 40.75364, -122.90642.
- Is Trinity Lake Boulevard 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
- Weaver Bally RoadHC · dirt · 9.6 mi at 9.7% · 4,918 ft · starts 0.5 mi away
- Oregon StreetCat 3 · 2.4 mi at 8.2% · 1,043 ft · starts 0.8 mi away
- East Weaver Creek RoadHC · dirt · 6.9 mi at 8.5% · 3,087 ft · starts 1.6 mi away
- East Branch RoadCat 3 · 1.8 mi at 6.2% · 574 ft · starts 2.7 mi away
- Poker Bar RoadCat 3 · 2.4 mi at 4.8% · 610 ft · starts 3.9 mi away
- Union Hill RoadCat 3 · 1.7 mi at 8.2% · 735 ft · starts 4.1 mi away
- Union Hill RoadCat 3 · 2.1 mi at 6.4% · 719 ft · starts 4.4 mi away
- Oak Ranch DriveCat 3 · 1.3 mi at 9.6% · 663 ft · starts 5.2 mi away
Places to ride to 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.