Stretching from the Gulf of Mexico to the St. Johns River, the Marjorie Harris Carr Cross Florida Greenway occupies much of the land formerly known as the Cross Florida Barge Canal. This 110-mile corridor encompasses a variety of natural habitats and offers an array of trails and recreation areas where visitors can experience Florida's premier greenway.

The trails in the SW 49th Avenue to Land Bridge region provide access to the west entrance of the I-75 trail and wildlife overpass known as the Land Bridge. Landscaped with native vegetation, the Land Bridge joins the east and west sections of the greenway to provide safe passage for hikers, equestrians and bicyclists over Interstate 75. This region of the Cross Florida Greenway is dominated by longleaf pine sandhill and sand pine scrub natural communities and is also site of an historic "digging." Remnants of the former 1930s sea-level ship canal project, these features are wide linear areas that were literally carved out of the landscape to begin excavation of a sea-level canal. Today, they exist as reforested, small-scale valleys. Because the bottoms of "diggings" are comprised of clayey soils that retain more moisture than the surrounding sandy soils, they are dominated by loblolly pines that prefer wetter areas than longleaf or sand pines. In many areas, they also offer challenging terrain and topography for trail goers.