<Tr> <Th> Open </Th> <Td> Year - round </Td> </Tr> <P> Lake Elmo State Park is a Montana state park located in Billings, Montana . Lake Elmo is Montana's most popular state park, drawing 153,000 visitors from May through August 2012 . The park occupies 123 acres (50 ha) and is at an elevation of 3,199 feet (975 m). Non-motorized boating is allowed on the lake . The park has three beach - front areas, a fishing pier, grassed multi-use areas, two group - use shelters for social events and a playground . Another feature of Lake Elmo is its Dog Park . The fenced - in area is located on the west side of the lake . </P>

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