Growing up in Cortez, Colorado, I was only forty miles from the Utah border. What societal differences those forty miles represent. I was quite oblivious to the history of the settlement and the societies that developed in the two corners of Utah and Colorado until I became a student at Brigham Young University in 1958. With Thirteenth Year in Zion, the LDS confront science, the ideals of America's separation of religion and government, and multicultural America. Chapters begin with a personal memoir from my time in Utah. The memoirs hold the reader's interest. But the book is much more than personal memoirs. I use the stories of my encounters to tie with Mormon behaviors that for nearly two centuries have isolated the Saints from mainstream America.