Los Osos Creek is a stream

Stream

A stream is a body of water with a current, confined within a bed and stream banks. Depending on its locale or certain characteristics, a stream may be referred to as a branch, brook, beck, burn, creek, "crick", gill , kill, lick, rill, river, syke, bayou, rivulet, streamage, wash, run or...

 in coastal San Luis Obispo County that discharges to Morro Bay. Los Osos Creek rises in the Clark Valley on the slopes of the Irish Hills

Irish Hills

The Irish Hills is an area of land located roughly in southeastern Jackson County and northwest Lenawee County in the U.S. state of Michigan. Its name comes from the Irish immigrants who settled there from 1830-1850...

. After flowing through Clark Valley, Los Osos Creek flows into Los Osos Valley

Los Osos Valley

Los Osos Valley is a landform along the coastal area of Central California south of the town of Morro Bay, California, USA. Prehistoric human habitation existed in the Los Osos Valley by the ancient Chumash tribe. An early European visit to the Los Osos Valley was recorded in 1769 by...

. In prehistoric times Chumash Native Americans

Native Americans in the United States

Native Americans in the United States are the indigenous peoples in North America within the boundaries of the present-day continental United States, parts of Alaska, and the island state of Hawaii. They are composed of numerous, distinct tribes, states, and ethnic groups, many of which survive as...

 had a significant settlement on a stabilized sand dune near the mouth of Los Osos Creek.