Mount Rainier Park: Chicago, Milwaukee & St. Paul to Ashford, Washington.
Crater Lake Park: Southern Pacific to Medford or Kirk, Oregon.
Glacier Park: Great Northern to Glacier Park or Belton, Montana.
Mesa Verde Park: Denver & Rio Grande to Mancos, Colorado.
Rocky Mountain Park: Union Pacific to Fort Collins or Greeley, Colorado; Colorado & Southern to Boulder, Loveland, Longmont, or Fort Collins, Colorado; Chicago, Burlington & Quincy to Longmont or Lyons, Colorado; Denver & Salt Lake to Granby, Colorado.
Grand Cañon: Atchison, Topeka & Santa Fé to Grand Cañon, Arizona.
Lassen Volcanic Park: Southern Pacific to Red Bluff or Westwood, California; Western Pacific to Keddie, California.
Hawaii Park: Steamer service from Honolulu, Hawaii.
Mount McKinley Park: No railroad connection until government railroad across Alaska is completed.