An assortment of issues have hampered the long-awaited upgrade of Tuatapere’s Hump Ridge track.

Supply chain delays, weather conditions and arduous terrain have slowed progress on the track just as it passed its halfway mark.

Department of Conservation Southern South Island director of operations Aaron Fleming said the upgrade was to bring the track up to Great Walk standard.

"There’s still a lot to do. All project partners have agreed more time is needed for construction, so the end date has been pushed out to October 2024."

The track is already open and in use, managed by the Tuatapere Hump Ridge Charitable Trust. Bookings are still open during construction, with public access given priority.

The Hump Ridge track winds for 61km through an alpine environment, and takes about three days for trampers.

Soaring limestone tors, uphill sections through coastal forests, expansive beaches, historic viaduct bridges, old timber settlements, and the longest tramway sleeper walk in the southern hemisphere are key features of the route.

"Great progress has been made to date and visitors walking the track this summer season will notice obvious signs of improvement, even if this is their first time on the Hump Ridge," Mr Fleming said.

Three sections of the track have clearly been upgraded and realigned, with new steps installed to cross over rough terrain.

Other parts are still under construction, but accessible.

The Rarakau carpark redevelopment has also started.

"We are also working with mana whenua Ōraka Aparima Rūnaka and Rowallan Alton Inc to develop storytelling and interpretation for the track. Significant headway has been made in construction of the Waharoa [gateway] for the track entrance.

"When the Hump Ridge track upgrade is finished it will be safer and more accessible to more people. Tricky gradients are being eased, boardwalks have been put in over mucky ground, sections of the track have been future-proofed against climate change and natural hazards and emergency alternative routes and new swing bridges are being constructed," Mr Fleming said.

"Improving the Hump Ridge track means this place steeped in cultural and historical significance becomes more of a drawcard for a larger pool of Kiwi and international visitors."