Waterloo Pool is a year round heated indoor swimming pool in Denison, TX. We proudly serve Denison, and communities in Grayson County, Bryan County OK. We offer Group Swim Lessons for youth and adults, Private Swim Lessons, Lap Swimming, adult aqua fitness classes, adult hydro fitness, and public open swim times. Facility features include a 7-lane 25m pool, diving board, and water slides. Book private birthday parties, table rentals, Mermaid Parties, and Log Rolling Parties. Make memories.