Discover Illinois' Sentry Bluff Trail, a scenic 3.2-mile hike with river views, wildflowers, and a natural sandstone arch. This adventurous route offers stunning landscapes and a rewarding challenge.

The event will mark the first open water swim in the Chicago River in nearly 100 years, according to organizers.

Hundreds of swimmers will dive into the first open water swim in the Chicago River in almost a century this fall.