The Pitt River Expedition is the name given to several expeditions, detailed below. Named for the Pit River (note the spelling difference), which is one of several tributaries of the Sacramento River. The expeditions were part of the Indian wars in California which took place during the California Gold Rush of 1849.

US Military

The most usually noted expedition is the Pitt River Expedition, in California, April 28 to September 13, 1850.

US Civil War Officer and General George Crook is noted as having led the Pitt River Expedition in as a 1st lieutenant in 1857 In one of the several engagements he was severely wounded by an Indian arrow.

State of California

The State of California notes expenditures in documentation for the California Militia and “Expeditions Against the Indians”, 1850 - 1859; which makes note of a Pitt River Expedition in 1859