Blue Spring State Park covers more than 2,600 acres, including the largest spring on the St. Johns River. Blue Spring is a designated Manatee Refuge and the winter home to a growing population of West Indian Manatees. The spring and spring run are closed during Manatee season, mid-November through March. Swimming or diving with manatees is not permitted; this rule is strictly enforced. For centuries, the spring area was home to Native Americans. In 1766 it was visited by Colonial American botanist John Bartram, but it was not until 1856 that it was settled by Louis Thursby and his family. The Thursby house, built in 1872, remains standing. The spring´s crystal clear, 73 degree water can be enjoyed by swimmers, snorkelers, and certified scuba divers with a partner. The river is popular for fishing, canoeing, and boating. River boat tours are available; for reservations, call St. Johns River Cruises at (386) 917-0724. The park has plenty of picnic areas and a hiking trail. For overnight stays, air-conditioned cabins,and a full-facility campground are available. This is a very popular park on weekends. To ensure entrance into the park, we recommend arriving early; otherwise, the parking area will be full and you may not be able to enter.