The first open water swim in the Chicago River in nearly a century is set for September 21, 2025, marking a significant milestone in the city's environmental restoration efforts while also raising funds for ALS research and youth swim education.

Chicago Mayor Brandon Johnson has praised the event as a notable achievement, highlighting its role in promoting safety and empowering Black and Brown youth through swim education.

This event is the result of decades of environmental improvements, including policy reforms, sewage upgrades, and real-time water quality monitoring, which have transformed the river into a vibrant ecosystem.

Experts have noted the river's rich biodiversity, showcasing the success of restoration efforts that have turned it from a heavily polluted channel into a thriving waterway.

Initiatives like H2NOW Chicago and investments in the Riverwalk have played a crucial role in revitalizing the river, enhancing its status as a cultural and recreational hub.

After a previous swim event was denied a permit due to safety concerns, organizers successfully secured approval this year, reflecting significant improvements in the river's cleanliness.

Safety remains a top priority for the event, with real-time water quality monitoring and over 100 safety personnel on-site to ensure participant well-being.

The swim will feature 500 qualified participants navigating either a one- or two-mile course along the river, starting from the Dearborn Street Bridge and finishing near the Clark Street Bridge.

Olympian Natalie Hinds will serve as the featured athlete and ambassador for the event, highlighting a new partnership between the Chicago River Swim and the USA Swimming Foundation.

Organized by the nonprofit A Long Swim, founded by Doug McConnell, the event celebrates 13 years of collaboration to restore the river and will also serve as a fundraiser for ALS research.

Spectators will have designated viewing areas along the Riverwalk, which will be closed to vessels during the swim, ensuring a safe and enjoyable experience for all.

Applications for participants are free and open until August 11, 2025, with selected swimmers required to meet fundraising commitments similar to those of the Chicago marathon.