On Canyon Creek, above its confluence with Slate Creek, in Yuba County. According to the County History, 1879, the bar was first worked by Mormons in 1849. While the gold was found four feet under layers of slate, $60,000 worth was taken out in the summer of 1849. "J.D. Borthwick passed the Slate Range House on the trail from Fosters Bar to Downieville in the fall of 1852 and gives a good account of the place. Many of the early writers mention the prosperity of the camp. According to the Marysville Directory, it was "quite a lively town" in 1858. In the 1860s the place ceased to be the center of the numerous camps and mines in the vicinity, and there are no later mining records. The site of the camp differs on older maps. On the USGS Bidwell Bar 1944 quadrangle it is recorded on the North Fork of Yuba River, between Canyon and Deadwood creeks. A locality, Slate Range, is about two miles south of it."
- Erwin G. Gudde, 1975
"About three miles northwest of Oak Valley is the little town of Slate Range, the center of quite an expanse of mining country. There were in its palmy days a hotel, store, saloon, etc., and in the vicinity quite a number of mines. There is no mining her now, but the hotel is kept running by William Quayle, who came here in 1850."
- Thompson & West, History of Yuba County, 1879