The Dundas Circuit is a well-known two- or three-day tramp in the northern Tararua Ranges. It’s beautiful, hard, rough… and somewhat ugly in places. My buddy and I took three days and it was one of my most challenging tramps to date. Putara Road to Herepai (2-2.5 hours) It’s a quick hour of easy and near-flat walking alongside the upper Mangatainoka River to the second swing bridge. The swimming holes are alluring but probably not needed this early into the trip! The swing bridge is a good place to rest before a 45-minute uphill slog to the junction with the…