We started ... to travel up Goose Creek. The road was very rough. The face of the country presents volcanic appearances. At the last crossing of Goose Creek we broke our small wagon, which detained us an hour and a half. It was fourteen miles from this place to the next water. We reached it at five o'clock, at the entrance to Thousand Spring Valley. The spring was a beautiful one, flowing out from beneath a large rock. Four miles beyond this rock we encamped for the night. Here we traded some gunpowder for an antelope ham, with some friendly Indians of the Snake tribe.
The map below shows the location of Rock Spring and the approximate July 19 campsite