Choose the 50km or 100km courseshort course main image


An awesome combination of fast pavement and rolling gravel roads. You’ll roll through Crane Hollow and other classic Boulder County mixed terrain. A road bike (with wide tires) or a cyclocross/gravel bike will be the best choice for this course. Sign up for the Run/Bike Combo and take on the 5.4 mile run before you ride the 50km course!


We’re switching up the 100km course this year adding beautiful views of the Twin Peaks and Carter Lake. You will ride north for a new gravel section and then a roll through a loop by Carter Lake. This means less overall elevation gain and no off-the-bike section. A cyclocross bike or road bike will be your best bet for this course.

gravel riders


Let Old Man Winter Rally propel you into more early spring gravel adventure with Sports Garage Cycling's Gravelanche 2018 Ride #1: Dirt & Doughnuts kicking off on March 3!
See you there!
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Gravelanche 2018 Ride #1: Dirt & Doughnuts

March 3, 2018, 10:00am - March 3, 2018, 2:00pm

Gravelanche returns on Saturday, March 3! We're rolling out for 90 - 120 minutes of glorious gravel at the second annual Dirt & Doughnuts ride, the first in our annual spring gravel series. This ye...

Old Man Winter Rally added a new photo — with Josh Kravetz. ... See MoreSee Less

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