The 24th Annual Umstead 100

The Umstead 100 Ultra is a 100-mile endurance run through the William B. Umstead State Park in Raleigh, NC. You have 30 hours to complete the race. There's also a 50-mile option.  

Character and Philosophy of the Run

The Umstead 100 Mile Endurance Run is designed to help new ultra runners make the leap from 50 mile runs to the more demanding 100 mile runs. It enables runners who have difficulty finishing 100 miles in 24 hours, or just finishing 100 miles at all, the opportunity to do so when severe topography, heat, and getting lost are removed as major obstacles. Many runners find the Umstead 100 an excellent foundation for the Massanutten 100, Western States 100, Leadville 100, and Wasatch 100 runs.

Time Limit

The run (100 miles or 50 miles) must be completed in 30 hours.

There is a cutoff time of 26 hours (8 am, Sunday) at the 87.5-mile point (the start of the last lap). Any runner who continues after that time/point is not guaranteed support.

Runner Requirements

  • Each runner is expected to be courteous to everyone: aid station volunteers, crews, other runners, squirrels, etc.
  • Each runner must ensure, verbally, that the scorer at each aid station has recorded his or her number. We have substantial problems with large groups of runners in the first loop and with non-reporting late at night when the timers are as tired as the runners. Help the timers by shouting your number!
  • All runners are responsible for the behavior and actions of their crew members. Please insure that crew members maintain control of all children.
  • No alcoholic beverages are allowed in Umstead Park by State law. None.
  • No pets are permitted at Race Headquarters, the cabins, the group campgrounds, or at the Aid Stations. Service animals are the exception.
  • Littering beyond 300 feet from aid stations is prohibited, and is grounds for disqualification.
  • It is each runner's responsibility to ensure that his or her number is visible from the front.
  • Runners and crews are expected to be familiar with and comply with all the information contained in the Race Information Packet and our website.


Crews are welcome, but are not crucial for this race. There will be a voluntary crew briefing at Race Headquarters Saturday morning after the runners start (see the Race Schedule). Crew members are allowed at the start/finish at any time, but please respect the effort of all the runners and stay out of the way.

Crew members are allowed on the course to pace their runner either after 6 pm, Saturday, or at the start of lap 5, if started earlier than 6 pm, or as expressly permitted by the Race Director or Aid Station Captain.

Crew members may not use bicycles to accompany or crew runners on the course at any time. Doing so will result in a runner disqualification. There will be no crew or runner parking on the park access roads leading to or at Race Headquarters.

We like to think of the Umstead as a one-big-happy-family type event. Race crews are welcome to assist with the operation of the aid stations. We appreciate any assistance, just come on up and offer to help. Our only requirements are a smiling face and patience with our runners.


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