KEYS100 Ultramarathon

Race: KEYS100 Ultramarathon
Sat May 20 - Sun May 21 Key West, FL 33340 US


Race Website

Additional race information can be found at


Higgs Beach
Key West, FL US 33340


Registration is open for the 15th Annual race across the islands of the Florida Keys in this Southernmost part of the United States.  The Keys is a chain of unique and inter-connected islands--some inhabited, some not--ending in the City of Key West, just 90 miles from Cuba. The Florida Keys, known locally as "The Conch Republic", is a spectacular and laid-back sub-tropical paradise, surrounded by the turquoise waters of the Atlantic Ocean and Florida Bay/Gulf of Mexico. The Keys feature great fishing, kayaking, snorkeling and diving, hotels, resorts, B&B's and cuisine and cocktails to fit every budget. There is entertainment to fit every taste, important history and a unique culture, sunsets that will keep you spellbound, special events going on throughout the year including KEYS100, of course, and you don't need a passport to visit here! So, what are you waiting for? We've saved a space for you!

Race Contact Info

If you have any questions about this race, click the button below.

KEYS100 official race video

The official race video, created in 2021 by Fort Lauderdale, FL videographer Tuan Nguyen, is an excellent representation of the KEYS100.  More photos, stories and videos from past years may be viewed at the "Photos & Stories" pages on the race website,

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Every Runner & Crew, Every Team & Driver Are Equally Responsible for Knowing and Complying with ALL Rules


IV'S and SUPPLEMENTAL OXYGEN PROHIBITED.  Anyone using an intravenous device or supplemental oxygen for ANY reason will be immediately disqualified from continuing to race. If medically required for a team member, that runner may not continue under any circumstances. Any other use of an IV or oxygen by a team member will result in immediate disqualification of the entire team.

AFTER SUNDOWN.  Defined strictly as 7:30pm Saturday until 6:00am Sunday, ALL racers (and pacers, if any,) must wear a vest or similar item with reflective material clearly visible 360 degrees, as well as clearly visible colored blinking LED lights facing front and rear. Anyone not complying will immediately be stopped and not allowed to continue, and may be pulled from the race. Both a reflective vest (or similar) AND blinking lights must be worn. (Reflective vests or similar reflective gear that incorporate blinking colored lights front and rear are acceptable.) Wear all gear as prescribed or sit until morning. No exceptions. Your life--and the race permit--are at stake. Important note: Headlamps do NOT count as required safety gear, but wearing one or carrying another type of light is strongly recommended. It can be quite dark in certain sections of the course which will materially impact your ability to maintain your preferred pace. Be smart; be prepared with all appropriate nighttime gear.

LIMITING NUMBER OF PEOPLE CROSSING OVERSEAS HIGHWAY.  When crossing US#1 on foot due to location of parking to either exchange or support a runner: For teams, only the new runner and a maximum of ONE additional team member may cross the road for the exchange and to assist the finishing runner. For individual runners, no more than ONE CREW MEMBER AND A PACER may cross the road. All others must remain on the vehicle side, well back from the roadway. ALWAYS wait for traffic to pass in both directions, then cross with extreme care. NEVER cause traffic to slow down or stop when crossing the highway. YOU MUST WAIT. Severe time penalties or DQ will be enforced with a zero-tolerance policy towards dangerous crossings of, or behavior on, any roadway.

EXCEPTION AT MM40 AFTER CROSSING SEVEN MILE BRIDGE, all team members or individual runner support crew may cross the road to meet their runner past the driveway into Veteran's Park. To avoid a bottleneck, no one other than race staff and active runners are allowed between the end of the bridge and the driveway into Veterans Park. Meet or exchange your runner past the driveway into Veteran’s Park. No parking in Veteran's Park or on the ocean-side shoulder. Vehicles are moving at high speed in this area, so it can be very dangerous. Extreme caution must be taken when crossing the highway.  If a Sheriff is on site, you MUST cross ONLY where they are located and at their direction.

RACING BIBS.  Bibs must be worn on the runner's front with race number clearly visible at all times.  IN ADDITION FOR TEAMS, the team bib with timing chip must be worn by the active runner when crossing each timing mat.  An adjustable belt will be supplied with the team bib for ease of transition from one runner to another.  Plan ahead!



PRESCRIBED EXCHANGE & SUPPORT LOCATIONS.  Team runner exchanges and individual runner crew support, must take place at prescribed stops only. Official lists of these locations which must be used during the race will be published on the website and distributed at packet pick-up. You are not required to use every allowable stop; but, when an exchange is made or support given, it must be at one of these locations. First violation will receive a one-hour time penalty. Second violation will result in immediate disqualification.

NEVER DISRUPT TRAFFIC.  Vehicles will “leap-frog” the runner along the race route.  Vehicles pulling on and off the road must do so conservatively, waiting for an adequate opening and not interrupting moving vehicles. Once on the road, speed must be maintained; no slowing down to converse with or otherwise support any runner while moving.  All support must be provided by crew members on the ground; handing the runner supplies from the vehicle is never allowed.  

ACTIVITY PROHIBITED ON BRIDGES.  No change of runners is ever allowed on a bridge. This includes Seven Mile Bridge. No support of any kind may be given to a runner on any bridge, and no support may ever be given from a moving vehicle. If approaching Snake Creek drawbridge (MM85.7) with gates down OR warning lights flashing that indicate the bridge is about to go up, runners and vehicles must stop IMMEDIATELY and wait until the bridge re-opens for vehicular and foot traffic. ANY VIOLATION OF THESE RULES WILL RESULT IN IMMEDIATE DISQUALIFICATION.  “DQ” WILL ALSO APPLY IF A TEAM RUNNER OR AN INDIVIDUAL RUNNER ON SEVEN MILE BRIDGE IS UNABLE TO COMPLETE THE DISTANCE.

PARK OFF ROADWAY.  Vehicles must be parked completely off the road surface whenever stopped. Vehicle doors must not open onto the road. Do not block bike lanes or trails. NEVER block a driveway, park or enter on private property uninvited.

SUPPORT VEHICLE.  Each team and individual runner must have its own vehicle, and only one vehicle per team and individual runner will be allowed on the course.  If one crew is supporting more than one runner, this one-vehicle-only rule still applies.  A "shuttle" vehicle to ferry crew or gear to the support vehicle is permitted on a very limited basis, but the "shuttle" may not remain on the course in active support.  All race vehicles must meet minimum requirements of property damage and personal liability automobile insurance for the State of Florida.  All vehicle drivers must be fully licensed.  Vehicle headlights must be on whenever driving on the road, 24 hours a day.

VEHICLE SIZE & TYPE RESTRICTIONS--FIRM: The team or individual runner support vehicle may be a car, SUV, minivan or full-size passenger van with standard roof line only--no raised roofs. Maximum length is 20 feet.  Not allowed on the course at any time are motor-homes or RVs of any type and of any length, including slide-in truck campers. Oversize vans including any RV conversions, are not allowed. Pick-up trucks up to ½ ton with two axles and "standard" wheels and tires are discouraged, but allowed as support or crew vehicles, but nothing over-sized will be allowed. No trailers of any kind or size are allowed.  No receiver baskets or similar extensions may be used unless the combined length with vehicle is under 20 feet. The decision of the Race Director or his designee will be final should any question arise about acceptability of a support vehicle. If you are unsure about whether your vehicle will be okay, ask the RD BEFORE the race.

PARKING LIMITATIONS FOR NON-PARTICIPANTS.  Due to extremely limited parking throughout the race, secondary vehicles, including those of family and friends, are NOT permitted at any support or exchange location.  Supporters, including family and friends, are invited to view the race start and are welcome to watch the finish at Higgs Beach. They may also park at non-race support locations and cheer their runner from there. To reiterate: LIMITED PARKING is the issue, not cheering fans!

NO PETS.   Pets are not allowed in race-support vehicles at any time, including team vans and individual runner support vehicles.  This rule will be strictly enforced.  Do not bring them.

VEHICLE MARKING & SIGNS.  Vehicles must have the team or individual runner NUMBER CLEARLY visible on all four sides of the vehicle.  Team or runner name is recommended but optional.  All must display a "CAUTION: RUNNERS ON ROAD" sign on the rear of the vehicle, as required by race permits.  This sign will be provided at pre-race check-in. Bring blue painter's tape for mounting sign.  Professionally made signs for these purposes may be substituted, if preferred.



STRICTLY FOLLOW COURSE.  Run ONLY where course instructions direct at all times. Cross the highway ONLY where instructed to do so. Examples: When running on the road shoulder, racers MUST ALWAYS RUN ON THE OCEAN SIDE OF THE ROAD FACING TRAFFIC. THIS IS NOT AN OPTION. When a bike path or sidewalk is available on the side of the highway where directed to run, runners will be instructed to use it and MUST run there and NOT on the road shoulder. This is also NOT an option; failure to do so will be considered cutting the course. The race's intent is to keep runners off the road shoulder to the maximum extent possible. Runners failing to comply may be required to retrace their steps to the point of infraction, then run the proper route, and will be subject to time penalties.

DECORUM.  Runners and crew must display courtesy, good taste, decorum and sportsmanship at all times, and must not litter, mar or pollute the landscape or environment. That includes defecation anywhere other than in bathrooms and portable toilets which are available throughout the Keys. Use them. Penalties for doing otherwise, including immediate DQ for flagrant violations, apply. Nudity is specifically not allowed and will be severely penalized.

CROSSING TIMING MATS.  Individual runners and teams MUST cross over all timing mats set-up along the course.  A list of timing mat locations will be distributed to all runners and teams.  

Note to teams: Each team member will be required to wear their individual racing bib at all times.  In addition, when crossing each timing mat, the TEAM bib number with timing chip MUST be worn so that the team's interim time is scored.  Plan accordingly when determining who runs each leg.

NO BIKES.  Supporters or pacers on bikes, skates, skateboards and the like are never allowed under any circumstances.

RUNNING UNDER OWN POWER.  Runners must progress under their own power without any type of physical assistance. Runners may not use walking sticks, ski poles or similar. Neither runner nor crew may carry an umbrella or shade cover while progressing on the course. Artificial cooling vests or systems are prohibited. Wearing ice in a bandana, buff or other article of clothing is permitted and encouraged.



ENFORCEMENT.   Violations of race rules will result in a time penalty for each infraction of up to one hour at the discretion of race marshals. Depending upon the severity of the violation and other factors, including but not limited to flagrancy of the violation and safety considerations, violators may be disqualified from the race at any time at the discretion of the Race Director.  Race marshals and staff will be monitoring the course throughout the race for runner health and safety and rules compliance.

MARSHAL'S JOB—NOTE TO ALL.  Race marshals will be on the route to assist runners and teams in any reasonable way. Some will be driving in separate vehicles and others will be imbedded with teams or individual runners' crews. Marshals will monitor compliance with race rules and be empowered to levy penalties, including disqualification. Marshals are NOT authorized to provide medical support, but will attempt to reach race medical staff or call 911, when warranted.


READ CAREFULLY.  CAPTAINS: THIS IS A RACE REQUIREMENT FOR SOME TEAMS.  Virtually all ultra-distance team relay races have significant volunteer requirements.  Without such help, it is extremely difficult for ultra-distance races to provide necessary runner support during the event.  For KEYS100, each team with one or more team members residing within 50 miles of any point along the course MUST provide at least one race volunteer to be available on race weekend for a minimum of four (4) hours to work at the finish line, a timing location or packet pick-up.  A team driver does NOT meet this requirement! Online Volunteer Registration is required; this allows volunteers to select the position and time slot they prefer--first come, first served--and to confirm that they are fulfilling your team requirement.  FOR 2023, ALL TEAMS REQUIRED TO PROVIDE A VOLUNTEER MUST DO SO NO LATER THAN MAY 1.  FAILURE TO COMPLY WILL MAKE THE TEAM INELIGIBLE FOR RACE AWARDS.  While this is a race requirement, we respectfully request everyone's help in encouraging as many people as possible to volunteer.  (It is inevitably a gratifying and inspiring experience for those who do.)  Please do your fair share in support of the race: identify your team volunteer and have him/her register before May 1st.


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