Boulder Big 8




Bike Ride

16203 ft

Begins in:
Boulder, CO, United States
Created By:
- Start at 4th and Mapleton in Boulder, Colorado <br> &lt;br&gt; <br> - Ride North and go up and over Lee Hill Rd. <br> &lt;br&gt; <br> - Go down Left Hand Canyon then left to Jamestown. Continue up past Jamestown to Sparn Road at the top of the long alpine-like climb <br> &lt;br&gt; <br> - Back down then turn right up Left Hand Canyon, through Ward, to the Peak-to-Peak Highway <br> &lt;br&gt; <br> - Back down, over Lee Hill Rd, to 4th and Mapleton <br> &lt;br&gt; <br> - Go west up Sunshine Canyon to where the road turns to dirt <br> &lt;br&gt; <br> - Back down then up Boulder Canyon to 4-Mile Canyon. Ride up this to the church in Salinas <br> &lt;br&gt; <br> - Back down then up Boulder Canyon to Sugarloaf Road. Up this to the top, to the Switzerland Trail sign. <br> &lt;br&gt; <br> - Back down, then up Magnolia Road to the top where it heads downhill and turns to dirt. <br> &lt;br&gt; <br> - Back down and ride down Boulder Canyon into Boulder. Go South on 6th Street to Baseline then turn right and climb Super Flagstaff to the mailboxes at the very top. <br> &lt;br&gt; <br> - Back down and finish at 4th and Mapleton
Starts From:
Bike Ride


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Climb Details

Rating Start/End Points Length Start/End Elevation Avg Grade
Cat 2 2.86 mi/8.02 mi 5.16 mi 5,543 ft/6,986 ft 5.3%
Cat 1 9.89 mi/16.72 mi 6.84 mi 6,475 ft/8,528 ft 5.7%
Cat 1 23.44 mi/35.19 mi 11.75 mi 6,477 ft/9,265 ft 4.5%
Cat 5 45.82 mi/47.00 mi 1.18 mi 6,732 ft/6,979 ft 4.0%
Cat 2 54.65 mi/60.68 mi 6.03 mi 5,504 ft/7,147 ft 5.2%
Cat 2 66.77 mi/74.17 mi 7.40 mi 5,431 ft/6,757 ft 3.4%
Cat 1 79.40 mi/86.42 mi 7.03 mi 5,814 ft/7,963 ft 5.8%
Cat 1 91.15 mi/95.93 mi 4.79 mi 6,159 ft/8,300 ft 8.5%
Cat 1 104.83 mi/110.61 mi 5.78 mi 5,445 ft/7,672 ft 7.3%

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