To Locomotive Springs To 8 4 and Boise, Idaho BLM Transcontinental Railroad National Back Country Byway (4-wheel-drive road) G e old iv e r n D S p ike e Camp Victory Site (Rozel) k D S i ri p ve N S Central Pacific crews broke I A n for lunch here in their race to T e S Last Spike Site ld IN lay the most track in one day. N o CIFI PA C A U Here at Promontory Summit G AL GR T East of the Promontory O NTR A N CE DE U M the Union Pacific and Central UN O Mountains, the Central Pacific I Begin East Grade Y Pacific rails were joined. O M Miles of track laid per day N Auto Tour and Union Pacific railroad R Begin West Grade P quickly became a contest between O A grades crossed each other Auto Tour T C the two railroads. In early April N Engine House I F several times. In some Closed December to May O IC (locomotive winter storage) GRA o Big Fill Loop Trail the Union Pacific laid 8.5 miles of M DE n places, they used the O To reach the West e - track in one day. The UP then bet R Grade Auto Tour drive w same grade. P a Big Fill Thiokol Propulsion 7 miles west from the y the Central Pacific $10,000 that H visitor center. T Kings Peak Visitor Center they could not better the record. R 5666 ft Park Headquarters Big Trestle Site O 1727 m 4905 ft On April 28, 1869, the CP won N 1495 m Last Cut Big Fill/Big Trestle Viewpoint o n the bet! E e D GRA ne of the Union Pacific’s most - IFIC O w PAC k a A World Record L difficult areas of construction was e y RA E e CENT D r Central Pacific crews A here, as they climbed the Promontory C GR finished their 10-Mile Day UNION PACIFIC Y e R Mountains. In the space of just 8 lu here, having laid 10 miles O B and 56 feet of track. T miles, the UP blasted 5 cuts through N O solid rock, building 4 trestles and 4 fills. W M LO OL O G H R old Y en OR P S NT pik O e OM Dr PR ive 83 North 0 0.5 1 Kilometer Golden Spike Auto tour route Unpaved road Hiking trail Self-guiding Picnic National Historic (unpaved) trail area 0 0.5 1 Mile Site To Promontory Point To 1 5 and Brigham City.