Gulf Islands National Seashore’s fall (November through December) ranger programs are as follows. FORT BARRANCAS AREA: Open Thursdays through Mondays, 9 a.m. to 4:30 p.m. Advanced Redoubt: Legacy in Brick & Mortar — Saturdays and Sundays at 11 a.m.; meet at the entrance to Advanced Redoubt. Fort Barrancas: Bastions on the Bluffs — Saturdays […]