Mission San Borja Hot Springs
Mission San Borja Hot Springs are located on the grounds of the historical Misión San Francisco Borja near the town of Rosarito in Baja California, Mexico. History. In 1752, the Jesuit missionary, Georg Retz arrived at the springs and ordered the building of a "visita" or subordinate mission for Misión Santa Gertrudis, at a "San Borja Adác" site. In 1758, Retz sent a group to confirm the hot water springs and cold springs at San Borja Adác. The hot mineral springs are located on the site of the Spanish Misión San Francisco Borja founded in  1762 by the Jesuit priest and explorer Wenceslaus Linck who worked with the local indigenous Northern Cochimí people who had been Christianized by Retz. The rock-lined soaking pool at the source was built in the early 1880's by the missionaries. Location. The springs are located approximately 20 miles East of the town of Rosarito. The rock pools are located next to the mission cornfields. The missions fields were watered with the run-off from the spring mixed with cold water from a nearby creek. Water profile. The hot mineral water emerges from the ground at 96°F