A groundbreaking celebration was held Wednesday to mark construction on Whiterock Conservancy's new Backcountry Trail system. The 35-mile trail will wind through the Middle Raccoon River Valley near Coon Rapids, Including the trails already at Whiterock, walkers and runners will have 40 miles of trails to use. Of those, 16 miles are designed specifically for mountain bikers and seven miles for equestrians. The trail is expected to provide a significant economic impact to the region through tourism.