New 2017 discount added to Fifty States Half Marathon Club discount list. This is a fast out-and-back 13.1 mile (half-marathon) that starts out at the Harriman Dam and mostly follows the old Hoot, Toot & Whistle rail bed along the west side of Harriman Reservoir, the largest body of water entirely within Vermont's borders. The Best Dam Run & Walk in Vermont Half Marathon takes place August 26th, 2017 in Whitingham, Vermont. The half marathon in walker friendly, is mostly f