Tree Trunk Gorge is a short but beautiful track that weaves its way through native forest, with a short steep climb, a picturesque river ford and some wooden bridges en route. The track is only 10kms but along the way you can also check out the awesome site of the Pillars of Hercules before biking down to the Poutu Intake on the Tongariro River where you will have lunch before enjoying a rafting experience. Rafting: You will then raft down the Tongariro River on our Grade 3 Whitewater Rafting section! This section has more than 60 rapids and beautiful scenery and wildlife along the way. It is suitable for anyone ages 11 and up! (11 and 12 year olds need a 1:1 ratio). 10km Grade 4 mountain bike track and 13km Grade 3 Whitewater rafting.