1983 Map of Chromo Mountain

About this map

The Continental Divide zigzags across this high-altitude landscape along the border of Colorado and New Mexico, marking the hydrologic backbone of the region. Much of the southern and eastern portions of the map fall within the expansive Tierra Amarilla Grant, a massive historic land tract that shapes the local geography. High peaks and deep incisions like Tuck Canyon define the terrain, while the Rio Chamita drains the eastern slopes. This 1983 survey records a landscape dominated by water and relief, featuring numerous named drainages such as Amargo Creek and Estufa Creek, alongside isolated high-country waters like Beaver Lake and Las Ranas Lake. The map provides a detailed look at the interface between Archuleta County, Colorado, and Rio Arriba County, New Mexico, during the early 1980s.