Abandoned South Austin railroad on track to become city's newest trail Bergstrom Spur would revitalize a now-defunct rail path. Photo courtesy of City of Austin A six-mile stretch of abandoned railroad could be on track to become Austin's next urban trail. Once part of the Union Pacific Railroad serving the defunct Bergstrom Air Force Base, the Bergstrom Spur would become a hybrid urban trail and public transit corridor. On December 9, Austin Public Works Urban Trails Program and the Capital Area Metropolitan Planning Organization released a hefty, 129-page study deemed the Bergstrom Spur Platinum Planning Study Report. It provides a detailed plan for creating a multi-use public trail beginning at Vinson Drive, in Southwest Austin, heading east to US-183 near Austin-Bergstrom International Airport.