The purpose of the hearing is to receive testimony on the following bills: S. 169, to amend the National Trails System Act to clarify federal authority relating to land acquisition from willing sellers for the majority of the trails in the System; S. 312 / H.R. 497, to authorize the Marion Park Project and Committee of the Palmetto Conservation Foundation to establish a commemorative work on federal land in the District of Columbia and its environs to honor Brigadier General Francis Marion; S. 580, to amend the National Trails System Act to require the Secretary of the Interior to update the feasibility and suitability studies of four national historic trails; S. 686, to amend the National Trails System Act to designate the Washington-Rochambeau Revolutionary Route National Historic Trail; S. 722, to direct the Secretary of the Interior and the Secretary of Agriculture to jointly conduct a study of certain land adjacent to the Walnut Canyon National Monument in the State of Arizona; S. 783, to adjust the boundary of the Barataria Preserve Unit of the Jean Lafitte National Historical Park and Preserve in the State of Louisiana; S. 890, to provide for certain administrative and support services for the Dwight D. Eisenhower Memorial Commission; and H.R. 1047, to authorize the Secretary of the Interior to conduct a study to determine the suitability and feasibility of designating the Soldiers' Memorial Military Museum located in St. Louis, Missouri, as a unit of the National Park System.