History

Long before European settlement, the land that is now Moraga was inhabited by the Saklan people, part of the Bay Miwok language group. The town’s name honors Joaquín Moraga, whose family played an important role in early California history. His grandfather, José Joaquín Moraga, helped build the Presidio of San Francisco and founded the pueblo that later became the city of San Jose. Joaquín’s father, Gabriel Moraga, was an explorer who named several major California rivers, including the Sacramento and San Joaquin. Moraga sits on land that was originally part of the 1835 Mexican land grant known as Rancho Laguna de los Palos Colorados, which was given to Joaquín Moraga and his cousin Juan Bernal. Portions of this historic grant included land that is now Moraga Ranch. The historic Moraga Adobe, associated with the family, has been preserved and is located in nearby Orinda.

In the early 20th century, the Sacramento Northern Railroad ran through Moraga. Much of the old railroad right-of-way has since been converted into the Lafayette-Moraga Regional Trail, a popular path for walking, cycling, and recreation.

Moraga’s first post office opened in 1886 but closed the following year before reopening in 1915. A new post office was built in 1955. The town officially incorporated in 1974 when the communities of Moraga Town, Rheem, and Rheem Valley joined together to form one municipality.

In 2017, Moraga declared a fiscal emergency after a large sinkhole and a damaged bridge on Canyon Road required costly repairs estimated at around $5 million.

Climate

Moraga has a Mediterranean climate characterized by warm, dry summers and cool, wet winters. Morning fog is common during the summer months but typically clears by late morning, leaving sunny skies for the rest of the day.

Most of the town’s rainfall occurs during the winter season. Snow is extremely rare, though occasional light dustings have been recorded. On average, Moraga experiences about 26 days each year with temperatures reaching 90°F or higher, around 40 nights that drop to freezing temperatures, and approximately 59 days with measurable rainfall. Like many parts of California, Moraga has faced periods of drought and elevated wildfire risk during particularly dry years.

Community and Culture

Moraga offers a suburban environment with access to parks, trails, and educational institutions. The Moraga Library, part of the Contra Costa County Library system, serves residents and students in the area and is located along Saint Mary’s Road.

Saint Mary’s College remains one of the town’s most prominent landmarks and contributes significantly to Moraga’s cultural and educational atmosphere.