The Electric City Water Park is now open for the season (through August 28).
The City of Great Falls provided the following information:
Hours are 12 p.m. – 6 p.m. daily, with the exception of Wednesdays. On Wednesdays, the Water Park will remain open until 8:00 p.m. Pool rentals are available in the evenings.
The Water Park includes the Mitchell Pool, the wading pool and interactive play structure (Little Squirts Soak Zone); the Power Tower Plunge; and the Flow Rider, where participants can boogie board, ride the lazy river and head down the riptide slide.
There is also lap swimming at the Water Park,
More Details at Source: http://www.krtv.com/story/38364160/electric-city-water-park-opens-for-the-season