The United States: Monticello displaces El Rancho
Two key events in 1848 – Mexico’s loss of the U.S.-Mexican
War, and the discovery of gold at Sutter’s Mill –
spelled the demise of the Land Grant Era. When it became clear
that California would be controlled by the United States, the
Mexican governor, Pío Pico, signed 800 land grants, giving
them fraudulent dates so that they would appear to precede the
American takeover7.
But squatters began entrenching themselves on the land grant properties,
and soon were emboldened enough to bring claims to court. In September
1850, California entered the Union as the 31st state. The judicial
system was increasingly populated by Anglos, who tended to side
with the squatters. Another contribution to the downfall of the
ranches came when miners married into land grant families, thereby
ensuring inheritance of the land. By the early 1860s most of the
original land grantees’ holdings had been fragmented or
lost entirely20,
24.
As
a result of these 19th-century sea changes in politics and economy,
a new American town, Monticello, came into existence in the Putah
Creek Basin. It soon developed into a prosperous agricultural
community during the early years of the 20th century. At this
time Berryessa Valley was a flat, fertile valley watered by Putah
Creek, and the soil of the valley was considered among the most
fertile in the country16.
The town of Monticello stood in the center of the valley, surrounded
by thousands of acres of land used to raise livestock and for
dryland farming of grain. The subsequent development of a canal
system for irrigation contributed to successful crops of pears,
grapes, walnuts, alfalfa, and other grains, and to herds of cattle
and horses. In springtime, wildflowers carpeted the valley floor
and hillsides, and California poppies spilled into the town cemetery16.

Monticello also became a popular venue for rodeos, baseball games,
and “cow roasts,” drawing people from miles around.
The town enjoyed the further distinction of being the first community
in the state to have a telephone system installed. Photographers
Dorothea Lange and Pirkle Jones16
described Monticello in the 1950s as “a center with only
one store, two gas pumps, a small hotel, and a roadside spot,
‘The Hub,’ and the valley held generations in its
palm.” However, this community was to follow in the sad
trail of the Patwin and the Berellezas.
The UC Davis library holds a number of documents and photographs
of Monticello and the building of the dam; many of these are available
online (http://lib.ucdavis.edu,
search ‘Monticello California’).