Oro Blanco

Overview

White gold in the border hills

Oro Blanco is the old name for a corner of the border country west of Nogales, and for the small village that once served its mines. The village stood along what is now Ruby Road, about four miles northwest of Ruby and seven and a half road miles south of Arivaca. The name means white gold. Prospectors in Spanish times probably gave it, because the gold they washed from the streambeds carried enough silver to look pale.

American mining started after the Gadsden Purchase but stalled during years of Apache raids and the Civil War. On March 20, 1873, Robert Leatherwood of Tucson located the first American gold mine here and named it the Oro Blanco. By the end of 1877 there were more than 100 claims, and a village had grown up to serve them. In the early 1880s more than 200 miners lived there in wood and adobe houses. A post office opened in 1879, and stagecoaches came down from Tucson.

By the late 1890s the larger camps in the district, Oro Blanco among them, had up to 50 people each. An atlas listed 96 people in 1902, and the post office closed in April 1915. USGS maps since 1979 label the spot Oro Blanco Ranch. Wikipedia, citing a 1980 guidebook, says some buildings and a small cemetery remain. We found no newer first-hand description, and we haven't confirmed who owns the land or whether visitors are welcome.

Timeline

What we know

1. About 1740Spanish-era prospectors probably first work gold from the streambeds. They call the region Oro Blanco, white gold, because the silver in it makes the gold look pale.
2. 1853The Gadsden Purchase makes the area part of the United States. Apache raids and the Civil War hold back mining for years.
3. Mar 20, 1873Robert Leatherwood of Tucson locates the Oro Blanco mine, the area's first American gold mine, two and a half miles north of the border.
4. Mid-1870sA village grows up along today's Ruby Road to serve the mines.
5. 1875The Ostrich mill, the district's first stamp mill, starts crushing ore from the Yellow Jacket mine.
6. 1877More than 100 claims have been staked and the Oro Blanco Mining District is organized. The Montana mine, Ruby's future mine, is located on April 10.
7. Oct 2, 1879The Oro Blanco post office opens. Dr. Adolphus Noon arrives the same year.
8. Early 1880sMore than 200 miners live in the village, in wood and adobe buildings. Stagecoaches run the 70 miles from Tucson.
9. Jul 1886Apaches raid John Bartlett's ranch in Bear Valley, nine miles southeast. His nine-year-old son runs to Dr. Noon's house in the village for help.
10. 1890Noon relocates the Austerlitz gold mine, two miles northwest of the Montana mine.
11. 1891An all-night Christmas party in Oro Blanco draws about 100 people from Arivaca and the camps.
12. 1902Cram's Modern Atlas lists a population of 96.
13. 1912–1913A short boom at the Austerlitz employs 40 men. Mule teams haul 50 tons of concentrates a day to the railroad at Amado.
14. Apr 30, 1915The post office closes.
15. 1931Adolphus Noon, called the Father of Oro Blanco, dies in Nogales at 93.
16. 1979The USGS map labels the spot Oro Blanco Ranch.

People and places

Mines, a village and a doctor

The name Oro Blanco covers several places, which makes the record easy to misread. The Oro Blanco mine, Leatherwood's 1873 claim, is on today's Forest Road 217 about three miles south of Ruby. The village, the point used on this page, is about four miles northwest of Ruby. The Oro Blanco Mining District around them runs roughly ten miles on a side, from about four miles south of Arivaca to the Mexican border.

The village's best-known resident was Dr. Adolphus Noon, an English-born doctor who arrived in 1879 at 41. He filed a homestead about seven miles south of Arivaca, started ranching near the village in 1881, and for many years was the only doctor between Tucson and Hermosillo. Newspapers called him the Father of Oro Blanco. On January 1, 1890, he relocated the Austerlitz gold mine, which had a working mill by 1894. Noon later moved to Nogales. He represented the new Santa Cruz County in the Territorial Legislature in 1900 and was mayor of Nogales in 1910 and 1911.

In 1912 and 1913 the Austerlitz had its one good run: 40 men, a stable of 350 mules, and about $96,000 of ore in two years.

A 2003 history column said Noon's ranching operation and the old Austerlitz mine were still in his family. It doesn't say whether that includes the village site.

Ruby grew from the same district. The Montana mine was located in 1877, Montana Camp grew up below Montana Peak, and the camp took the name Ruby in 1912. Ruby's townsite has been closed to the public since June 2024; see our Ruby guide.

Site map

Where the village stood

Today's USGS topo puts Oro Blanco beside Oro Blanco Wash and a small reservoir on Ruby Road, just north of the national forest boundary. The aerial shows ranch buildings at the reservoir's edge. The old sheets in the next section show the village in its setting. The 1921 Old Glory sheet places Oro Blanco at its northern edge, with the Austerlitz to the southeast and Yellow Jacket Hill to the west. The 1942 Oro Blanco sheet marks a cemetery just south of the village and the abandoned Yellow Jacket mine to the west. The 1979 and 2004 Bartlett Mountain sheets label the spot Oro Blanco Ranch, with the Choctaw mine to the east and the cemetery to the south.

The village sits less than half a mile south of the top edge of every historic sheet that covers it, so each crop shows map margin above it. We haven't been able to confirm which buildings still stand.

Historic maps

Oro Blanco on USGS maps, 1921–2004

Crops from the USGS Historical Topographic Map Collection, centered on the townsite. Each sheet shows what surveyors mapped that year; compare them with today's topo and aerial on this page.

19211:125,00019421:62,50019791:24,00020041:24,000

Map & directions

Getting there

Arivaca is the last town on the way, and both routes below run through it on paved roads from I-19. From Nogales you can also take Ruby Road west past Peña Blanca Lake and Ruby. That way is shorter, but about half of it is dirt; see our Ruby guide for it. We computed these routes from OpenStreetMap and haven't driven them.

Base map: USGS The National Map (public domain). Routes: OSRM on © OpenStreetMap contributors data (ODbL), computed October 2026. Times assume dry roads.

Photos

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Visitor reports

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Nearby

Other sites near Oro Blanco

Straight-line distance from the townsite to other mapped sites in our Arizona index.

• Ruby3.5 mi SE · Santa Cruz
• Old Glory4.5 mi S · Santa Cruz
• Arivaca6.4 mi NW · Pima
• Bear Valley raid7.2 mi SE · Santa Cruz
• Cerro Colorado11.3 mi N · Pima
• Las Guijas13.5 mi NW · Pima
• Tubac16.1 mi NE · Santa Cruz
• Calabasas18.1 mi E · Santa Cruz

Sources

Sources and credits

1. ghosttowns.com, "Oro Blanco": fact sheet fields (roads, legal description, climate, best time, remains, post office dates, population).
2. Wikipedia, "Oro Blanco, Arizona", retrieved October 2026: coordinates and elevation (GNIS), the 1902 population, and remaining buildings and cemetery, which it cites to Philip Varney, Arizona's Best Ghost Towns (Northland Press, 1980), pp. 88 and 91. We haven't seen the book.
3. Bob Ring, Al Ring and Tallia Pfrimmer Cahoon, "Along the Ruby Road," Green Valley News & Sun, 2003–2005, via the Internet Archive: No. 2 (the name, Leatherwood's mine), No. 3 (Yellow Jacket, the Ostrich mill, the district), No. 5 (Dr. Noon and the Austerlitz), No. 7 (the 1886 raid), No. 9 (the village, stage line, 1891 party) and No. 44 (Ruby Road surface).
4. Mary Noon Kasulaitis, "Arivaca Yesterdays: Dr. Adolphus H. and Emma Slaughter Noon, Oro Blanco Pioneers," The Connection, 2006: Noon's homestead south of Arivaca.
5. Dirty Freehub, Ruby route guide: notes Ruby closed to public access as of June 2024.
6. Coordinates: USGS GNIS (feature 36757). Land status: USDA Forest Service basic ownership map (the point lies outside national forest land). Routes: OSRM on OpenStreetMap data, October 2026. Not field-checked. Status checked against the sources above on October 19, 2026.

Photo and map credits

• Oro Blanco on the 1942 USGS Oro Blanco sheet: U.S. Geological Survey, USGS catalog, Public domain
• Topo map, area base map and aerial imagery: USGS The National Map (public domain).
• Historic maps: USGS Historical Topographic Map Collection (public domain): Old Glory 1921, 1:125,000; Oro Blanco 1942, 1:62,500; Bartlett Mtn 1979, 1:24,000; Bartlett Mountain 2004, 1:24,000.