Congress finally declared the meeting place to be Promontory Summit,where,on May 10,1869,two locomotives pulled up to the one-rail gap left in the track.After a golden spike was symbolically tapped,a final iron spike was driven to connect the railroads.The Central Pacific laid 690 miles the of track; the Union Pacific 1,086.They had crossed 1,776 miles of desert,rivers,and mountains to bind together East and West.