The Sub4 Challenge has created quite a fast event! In order to maintain a high level of safety, we have introduced a qualification system.  We place cyclists in corrals to start with cyclists in their time range. The new Primo start corral enables the fastest riders to start out front and move ahead with minimal congestion.


  • Finish a qualifying Rollfast event
    • Rollfast Fondo under 5 hours
    • Rollfast 8×8 Challenge (8 laps)
  • Hold a current USA Cycling or UCI professional, Cat 1 or 2 ROAD racing license
  • Log 500 hours or 10,000 miles on Strava in 2018
Register for the Fondo!