Several Texas State Parks are closed due to Tropical Storm Harvey. See state park alerts.


Old Tunnel State Park is the smallest state park in Texas, consisting of only 16.1 acres of land. Despite its small size, there are a variety of recreational and wildlife-viewing opportunities. The abandoned railroad tunnel is home to up to 3 million Mexican free-tailed bats (Tadarida brasilienses mexicana) and 3,000 cave myotis (Myotis velifer) from May through October.