Don't miss out on one of the last interior lots available in the Fire Rock Subdivision! This 1.12-acre lot offers an ideal balance of space and community, providing a rare chance to build your dream home in a highly desirable location, just 5 minutes from all of Billings' amenities.". Bring your own builder. Each lot requires cisterns and septic systems, and the association provides ditch rights for irrigation to tie into your sprinkler system for watering lawns.