Goldfields Railway, Heritage railway in Waihi, New Zealand.

Goldfields Railway is a heritage railway running 6.5 km between Waihi and Waikino through the Karangahake Gorge on New Zealand's North Island. It uses a surviving section of the East Coast Main Trunk Railway, built to 1067 mm gauge, and includes a few bridges, among them the only private railway bridge over a state highway in New Zealand.

This railway segment was originally part of the main coastal connection and remained active until 1978, when a new tunnel made the route unnecessary and it closed. The line now operates as a heritage service.

The line's name comes from the gold mining that prompted its construction: the Waihi Branch opened on 5 November 1905 to serve the Martha Mine, then one of the country's largest open-cast operations. At Waikino, the station building is Paeroa's former station, moved there in 1990; it now serves as a café and links the railway with the Karangahake Gorge walkway.

Trains run multiple times daily between the two stations with journeys lasting around 30 minutes each way. Arriving early is recommended to secure a good seat, especially during weekends and sunny days when visitor numbers increase.

Passengers can bring their pets aboard the open carriages and watch the former mining landscapes pass by. This policy makes the journey especially appealing for families traveling with animals.