The 3 mile bridge connects Gulf Breeze to Pensacola. Chickenbone beach is the northern side of Pensacola beach, the side facing the sound instead of the Gulf.
Chicken bone is at the west end of pensacola beach where the road stops right before you would start your hike out to ft pickens. They are currently building new pavillons down there which will be nice to have again. If you look at a map you will notice that it is directly south of the point in gulf breeze. And three mile just can't be missed look at the map. Connects the breeze to the main land.