No problem. He decided he'd just do his own race, 2 miles. With Grandma and Grandpa ready and willing to host an aid station which we could hit twice on our out and back run, and Grandpa doing double-duty as race photographer, and Mom as race videographer, we put together a top notch event.
Derek did great, and took my advice to mix running and walking, covering the distance with relative ease in just over 40 minutes. It was a blast. Might just become an annual event...maybe we'll even attract some other runners next year :-)