This May, head to Missoula, MT for the second annual springtime celebration that honors Marshall Mountain while unveiling freshly built trails in the region. You can run solo on the Revival 25k (covering 15 miles and 3,600 feet of climbing across three 5-mile loops plus a half-mile finish), join forces with 2-3 teammates for the relay version of the same distance, or opt for the shorter Moose 5 Mile loop with 1,200 feet of elevation gain on smooth singletrack. After you finish, enjoy post-race brunch and browse the local vendor village.