Placer Mandarins

The granite foothills along the old Central Pacific line, from Rocklin and Loomis up through Penryn and Newcastle to Auburn.

Acorns and Salt Springs

The United Auburn Indian Community, made up of Miwok, Maidu and Nisenan people, describes how the hill Nisenan lived from these slopes. Families or whole villages gathered acorns, with the men hunting while women and children collected the nuts knocked from the trees, then ground them into flour in bedrock mortars, swept with soaproot brushes. They gathered buckeye, pine nuts and hazelnuts, ate wild plums, berries and grapes, traded manzanita berries to the valley or made them into a cider-like drink, and took salt from springs near Lincoln, Cool and Latrobe.

The Gold Rush, in the Tribe’s words, brought “an onslaught of fortune-seekers with a rapacious appetite for gold, land, and other instant riches.” The United States took land in trust for the Auburn Band in 1917, ended its federal recognition in 1967, and restored it with the Auburn Indian Restoration Act of 1994.

On the Colfax-Todds Valley Consolidated Tribe’s page, elder Lola Gilbert Prout remembers how her family got by during the Gold Rush: “They picked fruit in the orchards, did lots of hunting, were guides.”

“The United Auburn Indian Community has always been a people of the land.”

United Auburn Indian Community

Ditches and the Railroad

A. F. Boardman’s orchard in Auburn, from Thompson & West’s History of Placer County, 1882.

The Central Pacific reached Newcastle on June 1, 1864, and Auburn the next May, and fruit became worth shipping. The miners’ ditches were easily turned into irrigation, and the foothill orchards ripened earlier than other districts’, so their fruit fetched higher prices.

Chinese laborers who had built the railroad found work clearing brush and on the new farms, and some rented land of their own. In 1880 the Placer Herald wrote that six years earlier the granite country around Newcastle had been “considered valuable only for quarries and random mining.” Now land “that was not worth a cent three years ago” was held as high as $100 an acre.

W. J. Wilson opened Newcastle’s first shipping house in the early 1870s. By 1889, with refrigerated rail cars, W. J. Wilson & Son was the largest fruit shipper in California, and 176 railcars left Newcastle that year. In 1900 the town shipped 1,054 carloads.

  1. 1864Rails reach Newcastle
  2. 1865Rails reach Auburn
  3. 1889176 railcars
  4. 19001,054 carloads

Oranges in the Granite Hills

By 1880 the granite hills held twenty or thirty thousand orange trees.

Moses Andrews of Auburn planted orange seed in 1860 on an exposed ridge 1,300 feet up and picked his first oranges in 1871. A frost in April 1872 killed tender fruit across western Placer, but at 800 feet it wasn’t felt, and the county history of 1882 drew the lesson: “through a certain belt of elevation there was greater security against loss by frost than in the apparently more fertile and favorable localities in the lower valleys.”

In 1881 Robert Williamson’s Orange Hill Fruit Ranch near Penryn had 1,400 orange trees, three years after he took up the land. On April 2, 1888, the owners of 10,000 acres between Rocklin and Penryn formed the Placer County Citrus Colony to lay out avenues, bring in water from the Birdsall ditch and plant oranges on a uniform plan. The colony sold no land itself. English families bought ten-acre ranches there, and about twelve had come by 1890, according to the Rocklin Historical Society; the colony was gone by 1905.

The Japantowns

Japanese farmers worked most of the fruit ranches in this part of Placer, and families bought land in the names of their American-born children. Loomis, Penryn and Newcastle each had a Japantown, and a smaller one grew in Auburn. The Placer Buddhist Church was founded in Penryn in 1902, and Newcastle’s Japanese Association Hall held a Japanese language school from 1916. The families grew stone fruit and pears.

In May 1942 two exclusion orders sent about 1,500 Japanese Americans from western Placer, including Loomis, Roseville and Rocklin, to the Marysville detention camp, also called Arboga. Almost everyone there was moved on to Tule Lake. The Doi family were the first to come back to Newcastle, in January 1945, and within their first month home someone tried to burn them out and put dynamite under their packing shed.

Mandarins

Pears were the area’s main export until disease swept the orchards in the 1950s and ’60s, killing trees within days. The orchards weren’t replanted, and Newcastle’s last fruit shipper closed in 1967.

Frank and Bernice Aguilar started farming in Penryn in 1947, on land with a few mandarins planted in the 1880s. In 1956 they replaced their other fruit trees with mandarins. Few people in the area had heard of mandarins, so most of the fruit went to a Sacramento wholesaler. Frank Aguilar and two Penryn friends, Ed Pilz and Harold Struble, planted more and bought a sizing machine together. In December 1972 a freeze killed hundreds of their trees. Their orchard is now Mandarin Hill Orchards.

Most of what the foothills grow is the Owari Satsuma, a seedless Japanese mandarin that stands more cold than other citrus. Orchards open from mid-November through January. In 2024 Placer County picked 930 tons from 280 acres, worth $3.25 million. Its pears covered 8 acres.

The Newcastle Area Business Association started the Mountain Mandarin Festival as a one-day event in November 1993. It drew about 1,000 people that year and more than 30,000 by 2013. The 2026 festival runs November 20–22 at The Grounds in Roseville.

  1. 280acres
  2. 930tons
  3. $3.25Mcrop value

“A healthy tree turned into a brown, wilted, dead tree, and there was no cure.”

Mountain Mandarin Growers Association, on the pear disease

Timeline

  1. Late 1840s The Gold Rush brings fortune-seekers into Nisenan, Maidu and Miwok country. The first people
  2. 1860 Moses Andrews plants orange seed on a ridge above Auburn. Citrus
  3. June 1, 1864 The Central Pacific Railroad reaches Newcastle. Rail and fruit
  4. May 22, 1865 Trains run to Auburn. Rail and fruit
  5. 1871 Andrews picks his first oranges. Citrus
  6. April 1872 A frost kills tender fruit in the lower valleys but spares the slopes at 800 feet. Citrus
  7. 1880 The Placer Herald counts twenty or thirty thousand orange trees in the granite hills. Citrus
  8. 1882 Thompson & West’s county history pictures A. F. Boardman’s orchard in Auburn. Rail and fruit
  9. 1889 Refrigerated cars carry Newcastle fruit east; 176 railcars leave that year. Rail and fruit
  10. 1900 Newcastle ships 1,054 carloads of fruit. Rail and fruit
  11. 1902 The Placer Buddhist Church is founded in Penryn. Rail and fruit
  12. 1917 The United States takes land in trust for the Auburn Band. The first people
  13. May 1942 About 1,500 Japanese Americans from western Placer are sent to the Marysville detention camp, then to Tule Lake. Rail and fruit
  14. 1956 Frank and Bernice Aguilar replace their Penryn orchard with mandarins. Citrus
  15. 1967 Newcastle’s last fruit shipper closes. The Auburn Band loses federal recognition. Rail and fruit · The first people
  16. December 1972 A freeze kills hundreds of mandarin trees at Mandarin Hill. Citrus
  17. November 1993 The first Mountain Mandarin Festival, one day in Newcastle. Citrus
  18. 1994 Congress passes the Auburn Indian Restoration Act. The first people
  19. 2024 Placer County harvests 930 tons of mandarins from 280 acres, and pears from 8. Citrus
  20. November 20–22, 2026 The Mountain Mandarin Festival at The Grounds in Roseville. Citrus

Where the Food Goes Now

Follow each Placer farm’s food to the Sacramento restaurants and markets that name it.

Pick a farm

Farms in the Placer County and where their food goes: read it as a list

Sources

Checked November 6, 2026. The mandarin at the top holds A. F. Boardman’s orchard in Auburn, 1882.