From the Roanoke County website:

Cheer on your favorite college team on Saturday at the Mid-Atlantic Regional Quidditch Championship at Green Hill Park. While you’re there, participate in the Tri-Wizard Tournament, a fun family event from Roanoke County Parks from 10am to 5pm. Compete as an individual or as a team for “house points” by performing challenges including a scavenger hunt, potions making and trivia. We’ll also have Potter themed crafts and activities all afternoon, plus live Quidditch demonstrations with the players. You’re welcome to come dressed in your wizarding best as you enjoy this FREE family event.