Front Range Climbing Grades

Most of these bicycle climbs and more can be found on our Colorado Climbs Page

  • Flagstaff - from Gregory Canyon trailhead turn off at end of Baseline. The first 5 miles have an average grade of 7.4% with a .3 mile section just below Lost Gulch Overlook at 14%. The first .5 mile above Gregory Canyon averages 10%, the 3.5 miles from Gregory Canyon to the Ampitheater turnoff averages 6.5, and the next two miles to the exit from the Mountain Park averages 10%.
  • Sunshine Canyon - From the end of Mapleton (Mapleton Avenue turns into Sunshine Canyon). The first 4.5 miles have an average grade of 6.7% with short stretches up to 14%.
  • Lee Hill/Olde Stage Rds - West on Lee Hill from Broadway. The climb up Olde Stage features about an 8% average grade. The first mile of Lee Hill beyond the Olde Stage turn-off is 11%.
  • Lefthand Canyon - From the turn off on US-36 and Lefthand Canyon to Ward. The first 16.5 miles average 4% grade, but the last 1.5 mile climb to Ward is 10%.
  • Jamestown - from the turn off on US-36 and Lefthand Canyon to Jamestown turnoff to above Jamestown. The three-mile section from the Jamestown turnoff to town averages 4.5% grade, with a 2.5 mile stretch above town at 8.3%
  • Lick Skillet Rd - From Lick Skillet in Left Hand Canyon to Gold Hill. This is a gravel road, climbs 800 feet in one mile for a 15% grade. This is one of the steepest if not the steepest roads in Boulder County. This climb ends in the town of Gold Hill.
  • Magnolia Rd - from Boulder Canyon. The first 4 miles have an average grade of 9% with a section at the bottom over 13%. The drawback to this ride is a busy approach through Boulder Canyon and the short tunnel.
  • Sugarloaf Rd - from Boulder Canyon. The first 4 miles average between 6% and 7% grades. The drawback to this ride is a busy approach through Boulder Canyon and the short tunnel right before the turn to head up Sugarloaf.
  • Golden Gate Canyon - west on Golden Gate Canyon Rd from Colo. 93. The road climbs for nearly 13 miles with an average grade of 6.5% and a one-mile stretch near the top at over 10%.
  • NCAR - from Broadway and Table Mesa. Average grade is 5.7% with sections up to 8% grade.
  • Morgul-Bismarck - from Marshall Road (Colo. 170) to south on McCaslin Blvd to west on Colorado 128. On McCaslin, The Hump is 8% grade, The Wall is 12%, and a section on Colo. 128 is 6.5% - each shorter than a mile.
  • Carter Lake - north from Boulder. After approximately 30 miles of flat, the climb to Carter Lake averages a grade of 6.4%

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