The Missouri-Kansas-Texas (MKT) St. Louis Subdivision is an N-scale layout of a segment of a prototype railroad.  The St. Louis Subdivision models the real world from Boonville, Missouri to St. Charles, Missouri, generally following the Missouri River as it snakes across central Missouri.

The layout is a single deck point-to-point style, with emphasis on operation. The layout incorporates off-site staging to enable trains to pass through the scenicked portion of the layout, then back to the staging area, embracing Allen McClelland's "beyond the basement" concept.

The layout has over 140 ft of scenicked main line, over four scale miles. Operation of the layout is enhanced by Bruce Chubb's Computer/Modeling Railroad Interface (C/MRI), which handles the signaling, turnout control, and block assignments used during operating sessions.  A computer monitor dispatching display, patterned after the Union Pacific Harriman Dispatching Center in Omaha, Nebraska, is used to select and monitor block occupation, cab assignment, train speed, and turnout condition.