Rio Arriba County is a county in the U.S. state of New Mexico. As of the 2020 census, the population was 40,363. Its county seat is Tierra Amarilla. Its northern border is the Colorado state line.
Rio Arriba County Courthouse, Isaac Rapp, architect, 1916-17
Ghost Ranch rainbow
Trick Rider, Rio Arriba Rodeo, 2013
Truchas Peaks in winter, viewed from Espanola