Tuesdays, June 12 – August 28, 9:00 am, Dillon Marina. Enjoy 360 degree views of the mountains and find out interesting facts from the Summit Historical Society during a one and a half hour pontoon boat interpretive tour of Lake Dillon. $20.00/ adults, $10.00/children (12 years of age and under), reservations required. Minimum age: 7 years. Call 970-468-5100 or visit Dillonmarina.com for more information.