Grand Gulf State Park

Often called the Little Grand Canyon, the park’s gulf was created when the ceiling of a giant cave collapsed more than 10,000 years ago. An uncollapsed remnant of the original cave forms a 250-foot natural bridge.

The gulf winds for more than a mile between vertical walls as high as 130 feet. Hiking trails, scenic overlooks and picnic sites are available.

The park is located 4 miles south of Koshkonong in Oregon County. It is unstaffed and is managed out of Bryant Creek State Park in Ava.