McGillivray has completed his birthday run every year since turning 12.
The race is slated for Aug. 16, the day before the famed Falmouth Road Race.
Here's a quick glimpse at some of the running apparel and accessories that you'll see in 2015.
Badwater Ultramarathon champion Harvey Lewis has a penchant for endurance-related adventures.
The legendary runner answered questions before a Nike event in her honor.
One of the Boston Marathon champion's lifelong dreams will come true this evening.
With cooler autumn weather just around the corner, finish the summer strong with one of these races.
The 22-year-old finished fourth in her first 10K on the road.
The 28-year-old Briton kicked in the last mile to earn the victory.