At Manakau, turn off to Waikawa Beach Road, and drive to the beachside settlement. Access is easy, and there is plenty of places to park vehicles and trailers.
Hokio Beach, Levin
Next north is Hokio Beach, Levin. Turn off the main road to Hokio Beach Road, and drive to Hokio. Once again, good parking facilities, and generally good riding surface on the beach. Riding north from here is excellent, taking you beside the Waitarere Forest, a restricted riding area being fenced and gates are locked.
Access is gained by turning off the highway on to Waitarere Beach Road, and here, you are able to drive onto the beach and park there if you prefer. This beach provides excellent riding, relatively free from logs, etc.
Just south of the township is the wreck of the Hydrabad, and riding north is a reasonable ride to Manawatu River, Foxton Beach.
Stay off the dunes, use official accessways only. See the map below to check what is permitted, where on Foxton Beach.