The Rail Cart Adventure (15 min drive)
This new adventure begins near Timber Trail Centre and takes you for up to three days along a disused railway track through 24 tunnels, forests and farmlands, and over 98 bridges. The mode of transport is self-driven individual rail carts - all the way to the edge of Mt Taranaki, some 150 kms away. Forgotten World Adventures that created this adventure won the People’s Choice Tourism Award in 2018 and a offer range of packages for different durations (none of which are cheap).
More info: https://www.forgottenworldadventures.co.nz/routes-and-trails/?type=2 and https://www.lonelyplanet.com/new-zealand/activities/the-ultimate-taumarunui-to-stratford/a/pa-act/v-37234P10/362795