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 include hiking, fishing, and wildlife viewing. Like in much of the upper Gulf Coast located along the northern vanguard areas of the Central Flyway migratory route, bird watching in Brazos Bend is a popular activity, especially during the migratory seasons. The park offers numerous Scouting programs, an orienteering course and is a popular spot for geocaching. The Texas Parks and Wildlife staff and the Brazos Bend State Park Volunteer Organization put on a variety of education programs on a weekly basis at the Park, and actively conduction outreach efforts in the local area. Popular programs include bird and photography hikes,