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


NOW it’s starting to look like Winter! Don’t forget - only two more days to sign up at the best price! #oldmanwinterrally ... See MoreSee Less

We switched up the 100km bike course for 2018, adding gravel roads heading up to Carter Lake and taking out the hike a bike section. This will make it a perfect course for a cyclocross bike, or even a road bike if the roads are dry. Check it out here: oldmanwinterrally.com/ride/ ... See MoreSee Less

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