KEYS100 Ultramarathon next weekend

The annual KEYS100 Ultramarathon from Key Largo at Mile Marker 99 to Key West is Saturday, May 21.

The start time is approximately 5:15 a.m. and the race runs approximately all day, Saturday night and into Sunday morning.

Runners will be crossing U.S. 1 at several points:

  • Atlantic Boulevard in Key Largo
  • Lignumvitae Channel in Islamorada
  • Channel Five Bridge
  • Guava Avenue in Grassy Key
  • Knights Key Boulevard in Marathon
  • Veteran’s Memorial Park at the south end of the Seven Mile Bridge

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

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