Fort Crook was established on July 1, 1857, to protect travellers on the Shasta – Yreka Road and the Lockhart Ferries.  Built by Company A, 1st Dragoons under the command of Captain John W. T. Gardner, the fort consisted of 25 – 30 log buildings enclosed by a pine-pole stockade 12 feet high.  It was located on the Fall River about 7 miles north of the town of Fall River Mills, California.  Originally called Camp Hollenbush, the outpost was soon renamed in honor of Lt. George Crook, then in command of Company D, 4th Infantry. Crook became a General during the Civil War and gained national fame as both a fighter of and advocate for the Plains Indians. The fort was decommissioned in 1869 & the current Fort Crook Museum was built in 1962.

From: https://www.fortcrook.com/