Tucked into the folds of the soft rolling hills of north central Texas, situated beneath the Lewisville Dam, the Lewisville Lake Environmental Learning Area (LLELA) occupies a unique ecological position in the landscape of North America. It is here where the northwestern-most extent of the bottomland forests stretch fingers into the southern end of the tallgrass prairie of the Midwest; where the Elm Fork of the Trinity River winds its way out of the sandy uplands of the dry Cross Timbers into the deep, rich soils of the Blackland prairies; where agricultural lands intergrade with ranching and a rapidly growing urban expanse.