Muriwai Beach is approximately 17 km west of Kumeu, 42 kilometres northwest of Auckland, at the southern end of an unbroken 50 kilometre stretch of beach which extends up the Tasman Sea coast to the mouth of the Kaipara Harbour. Much of the land at the southern end of the beach is part of the Muriwai Regional Park. Maori Bay to the south is separated from Muriwai Beach by Otakamiro Point, with its steep cliffs and rocky nesting areas that are home to the region's only gannet colony.
There are two entry points to Muriwai beach the first is just north of Muriwai township on coast road you hang a right before the township and follow the road to a gate turn left at the gate and you will be greeted with a sand track, 4 wheel drive is the norm as the sand is soft when dry you will rise over a crest and down the other side to the beach it is more difficult returning as the rise is steep from the beach. Just remember the beach is a public road and the same rules apply wof rego etc.
When driving on the beach always drive on the out going tide as most is cut off at high tide. The second entry point is off the end of rimmers road this entry is more tricky than the first, you need to be aware these entry points are changing all the time with shifting sand. Never drive up Muriwai beach with out another 4x4 with you if you get stuck you may lose your vehicle.
The drive up to the lagoon will take a while from muriwai as 50 km driving on sand takes some concentration, you need to look out for washouts where the tide has created big dips or at the extreme big holes in the sand, soft sand and logs and debris lying in your way any one of these can cause a crash even at slow speeds, you also need to watch out for fisherman and familys on the beach as well, once you arrive at the harbour entrance and you start to turn around the bend you need to make sure to stay on the hard sand as this area is prone to quick sand and it will stop you in your tracks, we have been caught out ourselves and get towed out of the soft stuff.
Inside the harbour entrance there are endless sand hills and fishing places to explore all along here until the end of the peninsula you can gain access to the lagoon here as well you can camp here but pick the right weather as this area is prone to strong sw winds which whip up from the ocean this is a full day trip but is worth the effort with great sea views and wilderness areas all along the way.