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Umstead 100 Mile Endurance Run

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Distanz Ultramarathon

Über Umstead 100 Mile Endurance Run

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.

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.


100 Mile

  • 160,934km

50 Mile

  • 80,467km



Aid station #1 is at Camp Lapihio and, during inclement weather, is immediately inside the headquarters door. During good weather, the aid station is outside at the Start/Finish line. There is unlimited crew access at the start/finish. Aid Station #2 (Chris' Ptomaine Tavern) is located on the old Crabtree Creek Bridge, at the 6.85 mile point of each loop. Access to AS #2 can be made by a 7-mile drive around the park or a 5.6-mile walk or bike trip along the course. Unmanned, "water only," stations are available at the 0.6, 2.1, 3.4, 5.6, 8.7, 10.6 and 11.9 mile points of each loop. The 3.4/10.6 mile point, Water Point #1, will also have Gatorade and a food box with a limited number of items such as cookies, trail mix, candy bars and pretzels. Latrines are available at all manned Aid Stations and Water Point #1.

Lagerung der Ausrüstung

Drop bags will be allowed at the Start/Finish and AS#2. At AS#2, please only use small or medium size bags, and no coolers.

Maximale Zeit

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.


Parking will be scattered throughout the four satellite cabin groups at Camp Lapihio.

Umstead 100 Mile Endurance Run Routenkarte

Umstead 100 Mile Endurance Run Routenkarte


Camp Lapihio Headquarters



The start/finish line is located at the Camp Lapihio Headquarters. Each loop begins and ends at the south door of the headquarters building.

The course is essentially a 12.5-mile lap in Umstead Park that you repeat eight times to reach 100 miles. You go counter-clockwise around the course:

You start at Race Headquarters and run the first part of the Headquarters Spur.
Then make a right turn and run out the Airport Spur.
You turn around and run back the Airport Spur.
Then you run the remainder of the Headquarters Spur, which leads to the large loop.
You then run around the loop and finish the lap by returning to Race Headquarters via the Headquarters Spur.

The Headquarters Spur (orange) is 1.85 miles long. This spur allows you to see fellow runners up to 5.3 miles behind and in front of you. The Airport Spur is .75-mile long, and branches off the Headquarters Spur at the 0.6 mile point of each loop. The Airport Spur is run only on the outbound leg of a lap.

The course is along a running, biking, and horse trail. The trail width varies between 8 and 15 feet and the footing is excellent. There is no single track trail on the course. All creek crossings are on permanent bridges. The course is an outstanding running surface. However, on the vehicle access road portion of the course leading into Camp Lapihio/Race Headquarters (.4 mile), there is larger crushed gravel that is typical for automotive traffic. The picture below is a typical part of the gravel trail. While you might be running fast enough to need that SLOW sign, it's really for the mountain bikers who might be coming AT you down the hill at warp speed. Stay alert!

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