And here you see some calculation of Tour Divide data, without guarantee, just for some estimations.
(corrected version, distance between LaGarita and DelNorte: 20 mi; thanks to Robert!)
The chronicle of my participation in the Tour Divide race, a self-supported mountainbike race along the world's longest MTB route. From Banff (Canada) through the U.S. states Montana, Idaho, Wyoming, Colorado and New Mexico to the Mexican Border at Antelope Wells, about 4.400 km and 60.000 vertical meters. [Images courtesy of AdventureCyclingAssociation. Great Divide is an ACA route.]