Hosted by the Waterloo Library & Historical Society, this family-friendly event features both a 5K run and a 1-mile fun run inspired by Laura Numeroff's beloved children's book. The first 100 5K runners will take home a book-themed medal and t-shirt, and all participants can enjoy cake at the finish line (1 mile fun run participants get 2 pieces!). All proceeds support the Waterloo Library & Historical Society, so you'll be running for a great cause while having fun.