Blacksmith Flat Road Climb near Colfax
- long (17.5 km)
- 11 mi
- long (17.5 km)
- of climbing (919 m)
- 3,015 ft
- of climbing (919 m)
- average grade
- 5.2%
- average grade
- steepest 500 m
- 13.2%
- steepest 500 m
Elevation profile
From 1,178 ft at the bottom to 4,193 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 Blacksmith Flat Road this week
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Is it safe to bike up Blacksmith Flat Road?
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 Blacksmith Flat Road
- How long and steep is the Blacksmith Flat Road near Colfax climb?
- 11 miles (17.5 km) at 5.2% on average, climbing 3,015 ft (919 m) from 1,178 ft to 4,193 ft. The steepest half kilometre averages 13.2%. That makes it a Hors catégorie climb.
- Where does the climb start and finish?
- It starts at 39.00373, -120.73271, and tops out on the road at 38.99044, -120.61359.
- Is Blacksmith Flat Road 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
- Blacksmith Flat Road near ColfaxCat 3 · 1.7 mi at 7.7% · 712 ft · starts 0.2 mi away
- Mosquito Ridge Road near ColfaxHC · 18 mi at 4.8% · 4,596 ft · starts 1.6 mi away
- Mosquito Ridge Road near ColfaxCat 2 · 9.5 mi at 3.6% · 1,795 ft · starts 1.6 mi away
- Bottle Hill RoadCat 3 · 3.4 mi at 3.2% · 564 ft · starts 5.2 mi away
- Breedlove RoadCat 3 · 1.6 mi at 6.5% · 535 ft · starts 5.8 mi away
- Wentworth Springs Road from Stag LaneCat 2 · 8.0 mi at 3.7% · 1,552 ft · starts 5.8 mi away
- Rock Creek Road from Unnecessary Trail near PlacervilleCat 3 · 1.7 mi at 6% · 538 ft · starts 6.2 mi away
- Rock Creek Road from Unnecessary Trail near PlacervilleCat 3 · 1.8 mi at 5.7% · 538 ft · starts 6.2 mi away
Places to ride to nearby
Found from OpenStreetMap roads and USGS 3DEP elevation; ranked on shape only. Hors catégorie: 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.