In the closing scene, Heyes and Curry join the stagecoach, tie up their horses behind it and climb on board. Initially, their horses are seen trotting behind the stage as it drives off, but as it climbs the hill, the horses are no longer there.
Though El Paso, Texas, is fairly near the best route from Tombstone, Arizona, to Denver, Colorado (you'd have to turn south instead of north at Las Cruces, New Mexico), the stage that takes George and her boyfriend to Denver doesn't go anywhere near El Paso. Instead, it crosses a 100-yard-wide corner of the Texas Panhandle. To get to that spot, the stage would have had to make a detour of more than 90 miles to the SOUTHEAST while crossing northern New Mexico.