To adjust the boundary of Big Thicket National Preserve in Texas and provide for three ecotourism projects within the preserve, and for other purposes.

Adjusts the boundary of Big Thicket National Preserve, located in East Texas, to include any lands acquired from willing sellers totaling not more than 100,000 acres of land near the Preserve.

Permits any owner of private property included within the boundaries of the Big Thicket National Preserve to have their property immediately removed by submitting a written request for such withdrawal.

Directs the Secretary of the Interior to construct and operate: (1) a system of canopy walks, elevated boardwalks, and associated interpretation that connect visitors with the ecological diversity of Big Thicket National Preserve; (2) a Big Thicket National Preserve interpretive center; and (3) canoe and kayaking trails in Big Thicket National Preserve.