The Nith River near Paris has one of the most scenic mild whitewater rafting sections perfect for family rafting trips. It also is the best beginner whitewater rafting in Southern Ontario. Location: Waterloo Region in southwestern Ontario, Canada. Grade of Rapids: I to III This narrow river brings the shoreline close creating excellent wildlife viewing opportunities of deer, fox, beaver and wild turkey. Further downstream are cascading drinkable springs at Devil’s Cave and rare limestone rockery. From this point the Nith River gathers speed creating standing waves and waterslides as it rushes to join the Grand River. A good option is to go with Grand River rafters. The cost for the 4-hour whitewater rafting trip with lunch included is around $65 per person.