Plan Your Visit
NPS Photo (Chuck Hunt)
On December 15, 1981, the Preserve was designated an International Biosphere Reserve by the United Nations Education, Scientific and Cultural Organization (UNESCO) Man and the Biosphere Program. On July 26, 2001, the American Bird Conservancy recognized the Preserve as a Globally Important Bird Area joining thousands of others around the world.
Today, the Preserve consists of 15 units covering over 108,000 acres of land and water.
Did You Know?
Tourism in the Big Thicket area dates back to 1845. A spa located in Sour Lake, catered to the likes of Sam Houston and sold the "sour" water to tourists