Brazos Mountains to 55 million years ago during the Laramide orogeny. To the east and northeast lie the Sangre de Cristo Mountains which share a similar geological history. The Brazos Cliffs, which form a dramatic backdrop to Tierra Amarilla, are formed of Precambrian quartzite. Brazos Mountains The Brazos Mountains is a range in far northern Rio Arriba County, in northern New Mexico in the southwestern United States. A high crest runs from the border with Colorado for over in a south-southeasterly direction. The high point of the range at is on Grouse Mesa, at the Brazos Benchmark. Two miles (3 km) to
Brazos Bend State Park maintenance of a natural landscape. In 1984 the Park was officially opened to the public, its lands having been donated to the state several years previously. In 2009, the Park celebrated its 25th Anniversary with a variety of special events and recognitions. Today the Park is run by the Texas Parks and Wildlife Department, with the assistance of an active non-profit volunteer organization. Although it contains recreational day-use areas (including a dining hall, campground, and picnic areas) Brazos Bend is by primary character a natural park. Its recreational opportunities revolve around enjoyment of its diverse ecosystems and species. Popular activities