Sentence:  [page 14] [T]wo resort owners in the Ely area were asked if they would be willing to join forces and attempt to get a trail constructed to connect the two businesses and jointly market a <WSD>ski-thru</WSD> program. ... [page 15] The end product of this activity was the construction of trail segments linking the existing cross-country ski trails with each other and with the two resorts. In addition to marketing cross-country skiing individually, the two resorts put together a <WSD>ski-thru</WSD> package and marketed it in cooperation with Amtrak. 
Meaning of the word marked with <WSD> tags:  Of a ski lodge or other hotel establishment: providing skiers with the service of transporting their equipment, luggage, and vehicles to other establishments so they can ski directly to those establishments.