nearest the road". Mountain Meadows massacre Location Mountain Meadows , Utah Territory Target(s) Fancher-Baker wagon train of Arkansan emigrants to California Date September 7 – September 11 , 1857 Weapon(s) guns , Bowie knives Deaths 100–140 Injured <17 Perpetrator(s) Nauvoo Legion (Local Iron County Mormon Militia), Paiute Native American auxiliaries The Mountain