The annual KEYS100 Ultramarathon from Key Largo to Key West is Saturday, May 18, and Sunday, May 19. The start time for both days is approximately 5:45 a.m. and the end time for both days is approximately 3:30 p.m.
The race historically has not heavily impacted traffic on U.S. 1 as the runners are typically spread out and running on the shoulder/Heritage Trail/bike path.
For more information go to keys100.com or visit them on Facebook at www.facebook.com/KEYS100Ultra/