On September 22, 1838, Juan Manuel Lorenzo Trujillo (1794-1855) led an advance party over the Old Spanish Trail from New Mexico to California. This expedition changed not only the lives of their children but also the lives of everyone who participated in this journey, their descendants and those fortunate enough to live or work in La Placita de los Trujillos. To help study, preserve and protect, interpret and educate, and promote respectful use of the Old Spanish National Historic Trail and closely related historic routes, an OSTA Inland Empire chapter, called the Agua Mansa chapter, was established in November 2016.