|Rock Island Spur of Katy Trail State Park|
Location of the Rock Island Trail in red and the Katy Trail in blue
|Length||47.5 mi (76.4 km)|
|Location||Missouri, United States|
|Trailheads||Windsor, Leeton, Chilhowee, Medford, Pleasant Hill|
Severe weather |
|Website||Rock Island Spur|
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" (embargoed and out of service) 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. 
An additional 144 miles (232 km) of Rock Island right-of-way is in the process of rail banking by the Surface Transportation Board. Missouri State Parks is evaluating adding this additional 144 miles to the Rock Island Trail, extending it from Windsor to Beaufort.  When completed the combined Rock Island and Katy trails will form a network of 450 miles (720 kilometres), though as of 2016 no timeline has been given for completion of the Beaufort extension.  
In May 2016, Jackson County, Missouri acquired 17.7 miles (28.5 km) of right-of-way from the Union Pacific Railroad, of section of line from the Truman Sports Complex to south part of Lee's Summit, to bring the trail into Kansas City. Work will begin in 2017, with the first section to open in 2018. There currently is a gap between Lee's Summit/Greenwood and Pleasant Hill, with the route unknown at this time.  
- "Missouri on pace to complete 47.5-mile extension of Katy Trail from Windsor to Pleasant Hill, Gov. Nixon announces". Office of Missouri Governor Jay Nixon. 2015-09-17. Retrieved 2016-02-23.
- "Rock Island Corridor". Missouri State Parks.
- "Frequently Asked Questions about the Rock Island Corridor from Windsor to Beaufort" (PDF). Missouri Department of Natural Resources. Archived from the original (PDF) on 2016-03-04. Retrieved 2016-02-23.
- "Missouri's planned Rock Island Trail gets a federal boost". Kansas City Star. 2015-02-27. Retrieved 2016-02-23.
- Brent Hugh (2015-09-30). "Jackson County & KCATA announce partnership to acquire final piece of cross-state Rock Island-Katy Trail system". Missouri Bicycle and Pedestrian Federation. Retrieved 2016-02-26.
- Rock Island Spur of Katy Trail State Park Missouri Department of Natural Resources
- Rock Island Trail in MO BikeRockIsland and TrailHub (maps, mileage, and other Rock Island Trail usage tools}