Site information:

0.7 mi N of old Alturas Hwy (Co Rd 114) and Hwy 139 jct, 12 mi SE of Tule Lake

The location above is from the OHP, exact camp location is hard to know.  Nothing remains of the site, as far as I know.

~41.854829,-121.314670

Plaque information:

No plaque

OHP description:

John C. Frémont's expedition from Fort Sutter to Upper Klamath Lake, which included Kit Carson and other scouts, camped here May 1-4, 1846. They were the first non-Indians ever to pass this way.

Registered 6/1/1932