Lone Rock Bible Church officially began services in September 1994. Lone Rock is the label for an area in the Bitterroot Valley, south of Missoula and east of Stevensville. For several years the Mission conducted AWANA club, adult Bible studies and, on occasion, Sunday services, under the direct auspices of the Lolo Community Church. For over twenty years, Lone Rock has been the site of a Vacation Bible School ministry.

The Mission's Don and Dale Oberg worked the Lone Rock ministry from 1990 to 1993. Kevin and Cori Horton and their sons Christopher, Andrew and Aaron began the work afresh in the summer of 1994, and held services once again that September. Attendance took off like a rocket, creating an enthusiastic fellowship, eager to reach the Bitterroot Valley for Christ. An unexpected heart attack took Cori home May 27, 1995. Kevin resigned the pastorate in January 1997; Jim and Mary Carlson began serving as interim that spring, and became permanent in September the same year. Jim and his wife Mary are graduates of Big Sky Bible College, formerly of Lewistown, Montana; he also is a graduate of Western Baptist Seminary in Portland, Oregon. Jim has served since 1981 in rural ministry, including eleven years as the executive director of the Rocky Mountain Bible Mission, and three pastorates. Jim and Mary have four pretty-much-grown boys.