Ocean Extreme’s floating Mountain Harbor Resort Location is a full-service dive shop on the lake. Serving as Ocean Extreme’s lake training location, this store offers PADI courses from Open Water to Divemaster every weekend from May to October (please contact the North Little Rock office for details and registration, 501-812-0006). The Mt. Harbor location is open all summer and offers the cheapest air fills on Lake Ouachita as well as equipment rentals and all of your diving needs while on the lake! Located at the largest resort in the state of Arkansas, Mountain Harbor Resort, the store is conveniently located next to the Mt. Harbor marina, the world’s only floating Subway Sandwich location, and the main Mt. Harbor boat launch.