Founded June 24, 1797, by Fr. Fermín Lasuén, Mission San Juan Bautista (in present-day San Benito County, CA) was the 15th of 21 Alta California missions. Its location was chosen for:
Adjacent to a large Mutsun (Ohlone/Costanoan) village (Popeloutchom). Missions required a concentrated native workforce for construction, agriculture, and conversion.
Situated on a raised terrace above the San Juan Valley, with the San Andreas Fault scarp providing a natural back barrier. Commanding views of approaches.
On the main mission trail between Mission San Carlos Borromeo (Carmel) and Mission Santa Cruz, roughly a day's journey from each.
The mission thrived: peak population 1,200+ neophytes, huge livestock herds, productive agriculture. The church (widest nave of any mission) survives on the original foundation, straddling the San Andreas Fault.