The Grilleta Tract was established by a donation of ten acres by the Xavier Grilleta of B&G Services in 1998. In 2001, an additional three acres were acquired that were adjacent to the original property. Although slightly smaller than the Port Commission Marsh, the Grilleta Tract is mostly chenier habitat and is considered the center of the Grand Isle Birding Trail. This stand of forest is one of only two undisturbed chenier forests that still exist on the island. In addition to live oaks, in which a select few are over 125 years old, the area supports a variety of trees and shrubs such as red mulberry, black willow, red bay.