Stop number four along the Gold Fever Off Road Trail is Holcomb Valley, is Jonathon Tibbets Grasshopper Quartz Mill. The Gold Fever Off Road Trail is a back country drive by some historical sites in Holcomb Valley, in the San Bernardino Mountains. Holcomb Valley located just west of Big Bear, California is the site of the largest gold rush in Southern California.
The location marker is the start of a short hike of about 300 yards past mounds of sand and the remains of a water pump. There is nothing remaining of the mill itself.
Located in the “center of activity” was a high piece of ground known as “Chinamen’s Knoll” in Holcomb Valley. Here Tibbetts operated a Pico Steam Engine powered stamp mill. Heavy iron heads rose and fell pulverizing ore from John Bull’s seven mammoth ledges of honeycombed quartz. The sand mound are old tailings from processing of gold ore by the mill.
Grasshopper Quartz Mill Summary
| Name | Jonathon Tibbets Grasshopper Quartz Mill |
| Location | Holcomb Valley, San Bernardino County, California |
| Latitude, Longitude | 34.3041, -116.8924 |
| Gold Fever Off Road Trail Marker | 4 |
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