The company's official site has lots of information aout the route - history, news and schedules.
John's Alaska Railroad
John Combs has built the Alaska Railroad fan site - it offers a remarkable collection of images, history and news.
Riding the Alaska Railroad, Seward to Anchorage
A lengthy photojournal of a mid-June (so lots of snow) ride along the most scenic section of the line.
714th Railway Operating Battalion
A Christmas card issued in 1944 while this US Army unit was running the Alaska Railroad.
Ship Creek, Anchorage
This newspaper article from June 1, 1915, describes the founding of Ship Creek, now known as Anchorage. It also lists many of the men hired to work on the construction of Alaska Railroad.