parking mariners basin
in mission beach across from belmont roller coaster (bay side) at first stop light heading south, turn left into the parking lot and stay to your right. there's all night free parking. one of the few all night parking lots. bring wheels because the beach at this section of the bay is very wide and soft. mariners is a pretty central location, 1.5 miles paddle to the mouth of the mission bay harbor.
good luck
