By bicycle: make your way across the Marine Parkway Bridge. Exit right (the only way to exit). Make your first right into the Riis Landing. There is a bike lockup rack beside the dock.
By MTA: Take the downtown 2 or 5 train to the end of the line, Flatbush Avenue. Find the Q35 bus stop right in front of the Bank of America on Flatbush (giant Target next door makes useful landmark). Take the Rockaway-bound Q35. Pull the cord as you enter the Marine Parkway Bridge, and get off the bus at the end of the bridge.
By vehicle: point your GPS toward 20234 Rockaway Point Blvd., Breezy Point, NY. About 1/5 mile before the destination, look on your right for a crossbar nailed to the telephone pole. Park in front of the second crossbar. There will likely be a white truck parked there as well.