[2] From 1773 to 1775, Font served at Mission San José de Tumacácori in Pima Country.
He was the chaplain of Juan Bautista de Anza's expedition that explored Alta California from 1775 to 1776.
[citation needed] While on the expedition, Font drew one of the first maps of the San Francisco Bay, naming the mountain range now known as the Sierra Nevada[4] He also identified the site for the proposed Mission San Francisco de Asís, which would be established later that year by Junípero Serra and Francisco Palóu.
[1] Font described the California grizzly bear, writing, "He was horrible, fierce, large, and fat."
Font interacted with Native Americans and observed homosexual behavior and saw a great need for Christianity to eradicate these "nefarious practices.