The Ozark Highlands Trail Association publishes excellent and up to date full feature maps (go to the Trail Maps and Store tabs on this website) of the OHT from Lake Fort Smith to Woolum (165 miles), and it provides access to maps of the Sylamore Section as well as a Lower Buffalo Wilderness OHT GPS Route guide book.
Most hikers use the Ozark Highlands Trail Guide by Tim Ernst for the Lake Fort Smith to Woolum, and Spring Creek Trailhead to Matney Trail Head sections (“http://www.timernst.com/Products/AHT.html”>Arkansas Hiking Trails). Because of trail re-routes, etc., this book’s references to specific mile markers are only approximate. This guidebook is also available at many retailers, and it is a great all around reference for the OHT.
The Arkansas Atlas & Gazetteer by DeLorme also shows the approximate route of the first 165 miles. The Forest Service sells a three map set, somewhat outdated, for the first 165 miles, but no descriptive text. The Sylamore Ranger District, Mountain View, has a free Recreation Opportunity Guide (contour map, mileage from Spring Creek TH) for the 32 mile Spring Creek TH to Matney TH section. (See Trail Map tab). No map covers the 13 mile Norfork Lake section (Contact the Corps of Engineers, Lake Norfork Project, Mountain Home, AR)