Lafayette’s two pioneer roads are still the city’s chief thoroughfares. As early as 1850 the dirt path that was to become Mt. Diablo Boulevard was declared a public highway by the Court of Sessions and defined as road district #6. It was described as the “road usually travelled from the Rancho of Vicente Castro by the Rancho of Elam Brown, intersecting road from Moraga Redwoods to Martinez near the house of Jonah Bernell” (probably the Juan Bernal adobe).
Elam Brown was named the district’s overseer, and all able-bodied males from 18 to 45 were ordered to work on the county’s seven thoroughfares five days each year when needed.
In the same year the Court of Sessions said of Moraga Road: “This road from the Moraga Redwoods to that leading from Martinez to San Jose is to be designated district #5.”