Troost Trail Climb
- long (4.3 km)
- 2.7 mi
- long (4.3 km)
- of climbing (247 m)
- 810 ft
- of climbing (247 m)
- average grade
- 5.7%
- average grade
- steepest 500 m
- 9%
- steepest 500 m
Elevation profile
From 1,398 ft at the bottom to 2,208 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 Troost Trail this week
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Is it safe to bike up Troost Trail?
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 Troost Trail
- How long and steep is the Troost Trail climb?
- 2.7 miles (4.3 km) at 5.7% on average, climbing 810 ft (247 m) from 1,398 ft to 2,208 ft. The steepest half kilometre averages 9%. That makes it a Category 3 climb.
- Where does the climb start and finish?
- It starts at 39.30331, -121.18124, where Troost Trail leaves Rices Crossing Upper, and tops out on the road at 39.32256, -121.16727.
- Is Troost Trail 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
- Pleasant Valley Road near Nevada CityCat 3 · 3.7 mi at 4.6% · 896 ft · starts 1.0 mi away
- Pleasant Valley Road from Sanctuary RoadCat 2 · 6.4 mi at 3.9% · 1,319 ft · starts 1.3 mi away
- Bitney Springs RoadCat 2 · 6.9 mi at 3.2% · 1,158 ft · starts 2.8 mi away
- Tyler Foote Crossing RoadCat 2 · 9.3 mi at 3.1% · 1,506 ft · starts 4.1 mi away
- North Ponderosa WayCat 3 · 2.1 mi at 5% · 568 ft · starts 4.5 mi away
- Hoyt Crossing RoadCat 3 · 1.0 mi at 10.4% · 564 ft · starts 4.7 mi away
- State Highway 49 near Nevada CityCat 3 · 1.8 mi at 6.4% · 607 ft · starts 4.9 mi away
- Fountain House Road from Indiana Ranch RoadCat 2 · 3.5 mi at 7% · 1,316 ft · starts 6.0 mi away
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.