Cherokee Marsh is Madison’s largest conservation park with three units – North, South, and Mendota. Each month, year-round we explore the north unit’s beautiful trails through the woodlands, wetlands, and restored prairies along the Yahara ‘Catfish’ River. Co-sponsored by Madison Parks, Friends of Cherokee Marsh , and Madison Audubon Society . Follow North Sherman Ave. to the parking lot at the end of the gravel entrance road. Free, family-friendly guided nature walks at Cherokee Marsh Conservation Park – North are held on the 1st Sunday of each month, year-round 1:30-3pm. No registration is required. No pets are allowed.