From Willcox, AZ / points west on I-10: drive 23 miles east of Willcox on Interstate 10 to the the town of Bowie. Exit at the first Bowie exit and drive through the town. Follow the signs for Fort Bowie National Historic Site and turn south on Apache Pass Road. Drive 13 miles to the Fort Bowie Trailhead (the last mile of the road is unpaved). Be prepared to walk the three miles round trip to the ruins and back to your car.