The Prospector is a rural passenger train service in Western Australia operated by Transwa between East Perth and Kalgoorlie. On this service, two trains depart almost at the same time in opposite directions, one travelling between East Perth and Kalgoorlie, and the other between Kalgoorlie and East Perth. The original vehicles ordered in 1968 for trains providing this service were replaced in 2004 with vehicles capable of reducing journey times to 6 hours 45 minutes.

Kalgoorlie is a city in the Goldfields–Esperance region of Western Australia, located 595 km (370 mi) east-northeast of Perth at the end of the Great Eastern Highway. It is sometimes referred to as Kalgoorlie–Boulder, as the surrounding urban area includes the historic townsite of Boulder and the local government area is the City of Kalgoorlie–Boulder.