One of the premier events on local road-racing calendar is coming up this weekend.

The sixth annual Bob Potts Marathon is set for a 6 a.m. start on Sunday.

The event, which annually attracts about 400 runners, is already sold out and registration is closed.

The course begins and ends at York College's Grumbacher Center, but the majority of the race is run on the York Heritage Rail Trail. An army of more than 200 volunteers are expected to help with the event.

The Bob Potts Scholarships are directly supported by the marathon. There are two $1,000 scholarships given to York County cross-country runners. The event also helps support the maintenance of the Rail Trail.

The event is named after one of the original members of the York Road Runners. Bob Potts died while running a triathlon in 2005 in New Jersey. His son, Sean Potts, is the race director.

The flat nature of the course makes it a favorite for runners hoping to earn a qualifying time for the Boston Marathon.

The course records for the Potts Marathon were both set in the first year, 2009. For the men, the record is held by Chuck Engle at 2 hours, 41 minutes, 35 seconds. The female record is 3:00.27 by Terri Rejimbal, who will also run in this year's race.

The event will also feature entertainment. Kayla Kroh will perform at Hanover Junction from 8 a.m. until 10 a.m., and Leah Burkey will play at the finish area from 10 a.m. until noon. Both artists will sell CDs and sign autographs.

For more information, visit bobpottsrun.com.