The Rock Island Spur of Katy Trail State Park is a state park in the U.S. state of Missouri that is 47-mile (76 km) rails to trails hiking and biking trail. Work on the trail was completed and the trail was opened on December 10, 2016. The trail provides residents of the Kansas City region direct trail access to the 240 mi (390 km) Katy Trail State Park, the longest rails to trails trail in the U.S. The Rock Island Trail uses "abandoned" right-of-way of the Chicago, Rock Island and Pacific Railroad between Pleasant Hill in Cass County and Windsor in Henry County where it meets the Katy Trail.

The Katy Trail State Park is a state park in the U.S. state of Missouri that contains the Katy Trail, the country's longest continuous recreational rail trail. It runs 240 miles (390 km), largely along the northern bank of the Missouri River, in the right-of-way of the former Missouri–Kansas–Texas Railroad. Open year-round from sunrise to sunset, it serves hikers, joggers, and cyclists. Its hard, flat surface is of "limestone pug".