While we were still on vacation in August, we all went to Flathead Lake in Polson, Montana. Flathead Lake is about 30 miles (50km) long and 16 miles (25 km) wide. It is the largest natural fresh water lake west of the Mississippi River and it is also one of the cleanest for its size. My family and I went jet skiing on the lake and it truthfully was such an amazing experience. It was so beautiful to see endless miles of water beside breathtaking mountain ranges. Much of the water is glacier runoff from Glacier National Park. Unfortunately, one bad thing did happen. My sister dislocated her arm and tore some ligaments, so she had to wear an arm brace. It was on the same side as my injured arm!!
(all facts about Flathead Lake found at Wikipedia)