Following the Anza expedition, the San Gabriel Mission became an important stopping place for expeditions traveling between Arizona and California. The mission was the first place where supplies could be procured after crossing the desert, and as travel over this road increased, the mission arranged to establish a supply station at some intermediate point east. In 1810, a party of missionaries, soldiers, and Native Americans from San Gabriel mission, under the leadership of Padre Dumetz, were sent out to select a location. On the 20th of May, 1810, they came into the San Bernardino Valley. This, according to the Roman Catholic Calendar of Saints, was the feast day of Saint Bernardino of Siena, and they named the valley in his honor. The expedition named the area around Upland "Cucamonga," which in the Tongvan language meant "sand place."