Climbing the Raurimu Spiral, Ja 1275 has filled the lower tunnel with steam hauling Mainline Steam excursion from Auckland to National Park. The grade is 2% with severe curvature and this part of the Main Trunk was electrified after lowering of tunnels in the 1980's.
Mainline Steam Heritage Trust operates steam specials throughout New Zealand from depots in Auckland, Wellington and Christchurch. Each year an inter-island Steam Tour attracts fans from around the world. For more visit www.mainlinesteam.co.nz