The Happy Valley Half Marathon & 5K will give you a breath-taking course, designed to showcase some of the most beautiful roads that New England has to offer, during peak Fall foliage. This PR inducing course, the events to follow, and the passion that we exhibit will exhilarate runners and walkers alike…from first timers to seasoned pros. We are pulling out all of the stops to make this run, your run, year after year. The Happy Valley Half Marathon & 5K will benefit the Campaign for the Cooley Dickinson’s new Emergency Department.