At the time of the road's creation, it was the shortest route from the city of Dunedin to the goldfields around Clyde, or Dunstan as it was then known.
[1] The road begins at Clarks Junction in Strath-Taieri, where it meets SH 87, and extends northwest, crossing between Lammermoor and Rock and Pillar Range before turning north.
It climbs to almost 1,000 metres (3,300 ft) before dropping to Paerau (known during the gold rush era as Styx).
The trail crosses farmland and subalpine tussock, passing close to Loganburn Reservoir, formerly the Great Moss Swamp.
[1] Beyond Paerau, the trail becomes rougher as it passes above the meanders and oxbow lakes of the upper Taieri River's scroll plain, and then descends towards Poolburn Reservoir, a location during the filming of The Lord of the Rings trilogy of films.