This day excursion takes us across the Canterbury Plains around 50 miles to Porters Pass (just under 1000 m and higher than Arthurs Pass) and into the Southern Alps. Mountain lakes and wide braided rivers pass through ancient glacial valleys. After about 2.5 hours we reach Arthurs Pass National Park and its beech forests. We drive to the top of the pass and divide looking over into the rainforests of the West Coast, then stop in AP village...