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The Umstead 100 is a race consisting of eight laps around a 12.5-mile loop in the William B. Umstead State Park. The first four laps (50 miles) must be done alone, after which an accompanying pacer is permitted.
The race starts at "HQ". The runner starts by going West (towards RDU airport) until the first turnaround. Then, the runner heads East towards the second aid station, passing the water station along the way. Finally, the runner heads back to the start/finish line.
You can learn more about the race on the official website and more about my preparation on my planning page. I use the UltraPacer platform to manage the paces for my goals; those goals are: