Rich was chosen and served as an apostle of The Church of Jesus Christ of Latter-day Saints (LDS Church) under Brigham Young after the Church settled in Utah Territory. President Young asked Rich to open up San Bernardino, California for settlement in 1850, and Bear Lake Valley, located in Utah and Idaho, in 1863. Rich founded many communities in Bear Lake Valley, including Paris, Montpelier, Fish Haven, Ovid, Georgetown, St. Charles, Bloomington, Bennington, Wardboro, Dingle, Glencoe and Pegram in Idaho, and Garden City, Meadowville, and Laketown in Utah.