However, because it stands alone, San Antonio Mountain is a distinctive feature that can be seen from as far as 60 or more miles away in southern Colorado and northern New Mexico.

However it may not be open to motorized travel by the general public, as there is a locked gate where the road crosses private property.

[4] The mountain is a dacite dome, built up of lava high in silica and mildly elevated in alkali metal oxides that erupted between 3.36 and 2.9 million years ago.

[6] The mountain features Gambel oak and ponderosa pine, with Douglas fir, Engelmann spruce, and quaking aspens at higher elevations.

In the fall, the Stuart Meadows wetlands on the nearby Rio San Antonio provide a stopover for migrating Sandhill cranes, mallards, American wigeon, Northern pintail, common yellowthroat, and sora.