roundhouse. UP has stipulated that the roundhouse must be vacated by the end of June 2012, underscoring the ORHF's determination to build a new facility. Operations Special excursions The ORHF and its member groups are constantly working to organize an excursion train or special appearance by one of the steam locomotives, usually originating in Portland and running distances of up to 2,000 or more miles over the course of several days, weeks, or even months. Excursions are often planned months or years in advance in accordance with the destination, and dependent upon the approval of the host railroad(s). An excursion may be as brief as never leaving the Portland city limits, or as long as the SP 4449's journey to Owosso, Michigan for TrainFestival 2009, hosted by the Steam Railroading Institute. The SP 4449 has also frequently appeared at the classic automobile show "Cruisin' Sherwood" in Sherwood Old Town, Ore., while the SP&S 700 often participates in the annual Burlington Northern Santa Fe Railway (BNSF) holiday celebration in Vancouver, Washington. Both engines teamed up in July 2005 to doublehead the National Railway Historical Society "Western Star" from Portland to Wishram, Washington. Each engine has also taken a turn on "Montana by Steam", a round trip between Portland and Billings, Montana, during the past couple decades. The 700 pulled a number of short excursions on the Oregon Pacific Railroad (OPR) in 2006 and 2007, along with appearances at the Salem Safety Faire in Salem, Oregon. In the summer of 2011, the SP 4449 hauled two excursions: one to Tacoma and Stampede Pass for the NRHS annual convention, and another up the Columbia River Gorge to Wishram to celebrate its 70th anniversary and help to raise funds for an upcoming 15-year boiler certification. Holiday Express One of ORHF's largest annual events is the operation of the "Holiday Express" excursion trains, pulled by locomotives 4449 and/or 700 on weekends in December between the Oregon Rail Heritage Center and Oaks Amusement Park. The Holiday Express has carried as many as 10,000 passengers each year. The trains run along the Oregon Pacific Railroad main line near the east bank of the Willamette River, while children on board are greeted by Santa Claus and company. The Holiday Express has been a major source of fundraising for ORHF, helping to raise the resources needed for the museum's ongoing construction. In 2011, the Holiday Express operated on the