Registration pricing
Choose your start line. Save your spot.
Early bird
October 10 – November 1, 2026
$130 USDStandard
November 2, 2026 – January 23, 2027
$140 USDProcrastination pricing
January 24 – February 5, 2027
$150 USDRace weekend
February 6 – 7, 2027
$160 USDThe course includes a gravel section on Cemex’s private property, only accessible during Old Man Winter.
Our biggest category with 1000+ riders.
Rolling gravel roads, beautiful views of 14ers, a loop around Boulder Reservoir, and life-long memories with 1000+ two-wheeled buddies. This course is a tour of some Boulder County’s best riding, including non-technical gravel riding and scenic views of the Rocky Mountains. There is enough rolling terrain to make the course challenging, but no major climbs or trails on this course. The aid stations at Boulder Res and Butter Ranch will warm you up and keep you fueled before the last stretch back to Lyons.
For those that ride AND run, this is the course that is the bike portion of the Run/Bike Combo.
PRE-RIDING THROUGH CEMEX (mile 2 - 3.6) is STRICTLY PROHIBITED. IT IS PRIVATE PROPERTY & YOU WILL BE ARRESTED FOR TRESPASSING.
Aid Stations:
AID 1 LOCATION COMING SOON
AID 2 LOCATION COMING SOON
Know the terrain
The route.
Explore the published map. Routes can change with conditions; follow the final event briefing.
Loads maps from Ride with GPS.
Open 40 Mile Bike route map ↗A closer look
Shots from the OMW Rally.
