The Sioux City Mariners Swim Team is the oldest swim team in Sioux City, established in 1928. Practices take place at North High School. Team seasons are Fall/Winter (September-March), Spring (April-May), and Summer (June-July). The Mariners Swim Club is a 501(c)(3) non-profit club that accepts children 7 years old and up. For more information please contact us at [email protected] We are always welcoming new swimmers.