Most of this large sandy island in Mission Bay is designated leash-free for dogs. Lots of sandy dunes to romp in, and the calm bay waters lets the more adventurous dogs take a quick dip. There is a designated off leash location on the backside of the island as Sea World will be on your left, fenced in front with signs. Very private with endless shores to run. Bring water for your dogs, there are porta-potties located around the island.