Deep River Waterpark opened in 1995..expanded in 2005...and is Northern Indiana, Southern Michigan and the Chicagoland's Largest! We feature activities and rides for all ages, from toddlers to grandparents! Offers exciting rides and entertainment for the whole family. Rides include exciting waterslides, a wave pool, and a lazy river. At Deep River Waterpark you'll find family affordable rates, packages, group discounts, lodging packages, Birthday Parties and more