San Antonio Mountain

San Antonio Mountain is a standalone volcanic peak in Rio Arriba County reaching an elevation of about 10,900 feet in the Taos Plateau volcanic field. The summit rises sharply from sagebrush plains and measures roughly 5 miles (8 kilometers) across its base.

The peak formed approximately 3 to 3.5 million years ago through dacite dome construction during the Taos Plateau's volcanic activity. This initial formation permanently shaped the geological landscape of northern New Mexico.

The Tewa people of the Rio Grande valley call this peak Bear Mountain and regard it as a sacred location connected to the north direction in their traditional beliefs. It serves as an important marker in their understanding of the landscape.

Forest Road 418 provides the main approach to the summit, though visitors must navigate around private property boundaries and hike the final stretch through Carson National Forest. Plan for rough terrain and minimal facilities at the mountain.

The peak remains visible from remarkable distances and can be spotted from up to 60 miles away across Colorado and New Mexico under clear conditions. This visibility made it a crucial landmark for travelers navigating the plateau region.

Location: New Mexico

GPS coordinates: 36.85974,-106.01891

Latest update: December 10, 2025 20:06