Karioi was a station on the North Island Main Trunk line,[1] in the Ruapehu District of New Zealand.

[7] The rails were extended to the station in March,[11] or April 1907[12] and the line opened from Waiouru to Rangataua for goods traffic on 12 August 1907.

[2] About 1926 the mill bought 3 Nattrass Tractors[14] and were quoted as saying, "After spending £7000 on a tramway, and purchasing a locomotive (unable to shift any timber because of the grade being one in nine), one million and a half feet of timber accumulated, and your Rail Tractor saved the situation.

"[15] The line was worked by an NZR P class (1876) loco, transferred from the Sanson Tramway in about 1922, but it was dismantled by 1932.

It remains surrounded by beech forest, in which tūī, kākā, korimako, pīwakawaka and toutouwai are commonly seen.