The pronghorn (Antilocapra americana, Ord) is New Mexico's third most important game ungulate. In 1963, 90,000 big game hunters spent $16.6 million in New Mexico (26). Approximately $358,000 was spent in pursuit of pronghorns. These numbers may double by 1975 because of the expected increase in population and the increasing percentage of hunters. Because of these hunting increases and additional demands on all phases of outdoor recreation, wildlife managers will be forced to engage in more intensified game management programs. They must find ways to increase carrying capacity of game ranges and increase the production of game herds. The objective of this study was to determine the factors that were restricting pronghorn increase on the Jornada Experimental Range. Even though hunting is not allowed on the area, the basic information gained could be used to improve management of pronghorns on similar areas of the Southwest. If habitat requirements are known, it might be possible to increase pronghorn habitat and numbers through habitat manipulation.