When did the first Mormon pioneers arrive in the Salt Lake Valley?
Despite popular belief and Utah tradition, the first group of Mormon pioneers arrived on July 22, 1847, not July 24, 1847. Leader Brigham Young and his group arrived two days after the first group. It was when he sat up in his wagon from being ill and stated "This is the place!." That's why that date was recorded and declared the official arrival into the valley.