Pajarito appears in documents from the seventeenth century. The earliest known reference is 1643 when the resident priest at Isleta acquired Pajarito as a small ranch. The origins of Pajarito are, indeed, nebulous. The land, about a league north of Isleta, was used for raising crops and herding. By the eighteenth century, the area would bear the name Puesto de San Isidro de Pajarito. In the nineteenth century more travelers began using the road along the west bank of the Río Grande which brought more visitors to the Atrisco Valley and Pajarito.