Fort De Soto Fort De Soto Park 3500 Pinellas Pinellas Bayway South, Tierra Verde, Fl 33715, southwest corner Mullet Key, Pinellas County Video: Historic Timeline Tampa Bay area • Tocobaga Indians occupied area from approximatelyA.D. 1,000 to A.D. 1,500  • One of first noted visitors Ponce de Leon, who anchored ship off island and scraped barnacles from vessel in 1513. Expedition withstood attack by Timucuan Indians; […]