Its 1,100 acres (4 km2) include the 19th-century Fort Clinch, sand dunes, plains, maritime hammock and estuarine tidal marsh.

It was named in honor of General Duncan Lamont Clinch, important figure in the First and Second Seminole Wars.

In addition to exploring Fort Clinch, activities include pier fishing, sunbathing, hiking, surfcasting, camping, birding, and shelling.

[2][3] On the first weekend of each month, costumed interpreters perform living history re-enactments of a Civil War soldier's life in 1864 at Fort Clinch.

[4] Activities include military drills, and working in the fort's laundry, infirmary, kitchen, barracks, quartermaster, United States Sanitary Commission and carpenter shop.