The elevation controversy has been put to rest. In 2002, OWA of Colorado guided a group of teenagers, to the summit and confirmed the actual height of Ancohuma to be 6425 m +/- 2m. The project was sponsored by Trimble and OmniStar and overseen by Jerry Brown of Bear Creek Surveying in Durango who has now mapped the Colorado Trail 3 times and rediscovered the lost Silver Trail in Copper Canyon, Mexico. Here's the link to the full story --http://www.bearcreeksurvey.com/anchouma.htm