Monument Health Spearfish Clinic, North Avenue 1445 North Avenue, Spearfish, SD 57783 605.644.4170 Location Details. Monument Health Rapid City Hospital 353 Fairmont Boulevard, Rapid City, SD 57701 605.755.1000 Location Details. Monument Health Spearfish Hospital 1440 North Main Street, Spearfish, SD 57783 605.644.4000 Location Details..