Railbookers
Grand Alaska Adventure with Alaska Railroad Northbound
10-day Alaska Railroad journey from Anchorage north to Fairbanks
Railbookers · Independent rail package
10-day Alaska Railroad journey from Fairbanks south to Anchorage
Railbookers operates this 10-day, 9-night independent rail package that travels south through Alaska aboard the Alaska Railroad, starting in Fairbanks. From Fairbanks, the trip rides the railroad to Denali National Park, described as the crown jewel of Alaska, and on to the town of Talkeetna. In Anchorage, the description mentions touring Earthquake Park and watching seaplanes splash-land on Lake Hood. The trip then continues to Seward, where a cruise through Kenai Fjords National Park brings views of wildlife and mountains, though the description is cut off before it finishes describing this section. As an independent rail package, travellers make their own way between stops rather than following one guided group. It suits travellers who want to see Alaska's national parks and coastal wildlife by train, starting from the interior rather than the coast.
Railbookers
10-day Alaska Railroad journey from Anchorage north to Fairbanks
Railbookers
Alaska Railroad trip linking Anchorage, Kenai Fjords, and Denali

Alaska Tours (alaskatours.com)
Ten-day rail tour covering the entire Alaska Railroad network

Amtrak Vacations
Independent coast-to-coast US rail trip on four Amtrak trains, LA to Boston