The Tundra Trail is 1 mile round trip. August 10, 2012 by Matt ThomasThe Tundra Trail is 1 mile round trip. Rocky Mountain National Park About Matt Thomas Matt is an avid writer and explorer, who loves to showcase his home state of Colorado. His favorite place to be is right here in the Centennial State. Previous Post:The Tundra Trail is 1 mile round trip.