The Great Northern No. 2507 is a class P-2 4-8-2 steam locomotive built by the Baldwin Locomotive Works in October 1923 for the Great Northern Railway.
The locomotive was one of a batch of twenty-eight 4-8-2 "Mountain" type locomotives built by Baldwin for the GN Railway in Passenger service. These locomotives such as the 2507 had 73" drivers, 210 Lbs. PSI in the boilers and with 29" x 28" cylinders they gave 57,580 Lbs. of tractive effort. In its early years it was used for passenger services like the Oriental Limited on the GN for years and at later times after the war, when Diesels took over passenger duties, the 2507 would volunteer hauling freight trains. The locomotive was retired from active service in December 1957.
In 1962, the 2507 was donated to Klickitat County by the SP&S and placed on display near Maryhill, on the Columbia River.
The SP&S donated the GN locomotive since all of the SP&S steam had already been scrapped (except #539, donated to the city of Vancouver, WA and #700 which had been donated to the City of Portland, OR).
The locomotive was barged from Maryhill to Pasco a "few years" back with the intention of restoring it to operation. The restoration effort broke down and it's currently stored on a spur at the east end of the Port of Pasco waiting for its fate to be decided by Klickitat County.
Today the 2507 has been moved to Wishram, WA and also was repainted. The 2507 will be moved to a new display site in Wishram soon.