In April 1598, a group of military scouts led by Juan de Oñate, the newly appointed colonial governor of the province of Santa Fe de Nuevo México, became lost in the desert south of Paso del Norte while seeking the best route to the Río del Norte. A local Indian they had captured named "Mompil" drew in the sand a map of the only safe passage to the river. The group arrived at the Río del Norte just south of present-day El Paso and Ciudad Juárez in late April, where they celebrated the Catholic Feast of the Ascension on April 30, before crossing the river. They then mapped and extended the route to what is now Española, where Oñate would establish the capital of the new province. This trail became the "Camino Real de Tierra Adentro", the northernmost of the four main "royal roads" – the Caminos Reales – that linked Mexico City to its major tributaries in Acapulco, Veracruz, Audiencia (Guatemala) and Santa Fe.