This is one of my new favourite places. 10 mins south of Ward (which is south of Blenheim and then turn inland for 1/2hr). This is an easy wander up stream and on a hot Marlborough day you have plenty of pools to play in. Its a 2.5 hr walk in to Isolation Hut which has 6 bunks but there is plenty of room for camping down by the river). The scenery is stunning.