Utah Timeline By Scott Young Jul 24, 1847 pioneers came into valley Sep 11, 1857 Mountain Meadows Massacre May 10, 1869 the railroads met at Promontory Summit Feb 10, 1873 polygamy was outlawed by congress Mar 3, 1887 edmuds tucker act passes Jan 4, 1896 Utah becomes a state May 1, 1900 scofield mine disaster Nov 19, 1919 zions national park was dedicated Aug 26, 1920 19th amendment; women get full voting rights May 26, 1936 Reva Becks bosone becomes first women judge in utah Feb 8, 2002 utah hosts winter olympics