Which route were Easterners going to the Great Salt Lake most likely to travel?

They are most likely to travel at the Mormon Trail in Great Salt Lake City that located in northern part of Utah, United States of America because it is the only and the best access path to Easterners people. Mormon Trail is a 1,300-mile route that the members of the Mormon pioneers of the Church of Jesus Christ of Latter-day Saints traveled during 1846 to 1868.