Utah History By Asheo Jul 24, 1847 First Entry Into Utah Sep 9, 1850 Utah Became a Territory Sep 11, 1857 Mountain Meadows Massacre Jan 29, 1863 Bear River Massacre May 10, 1869 Transcontinental Railroad Completed Apr 6, 1893 Dedication of the Salt Lake Temple Jan 4, 1896 Utah Became a State Nov 19, 1919 Zion National Park Dedicated Feb 8, 2002 Utah Olymics