The Paso Robles fire department responded to a report of a vegetation fire Monday afternoon, at around 5:11 pm.
The department says the fire was in the Salinas riverbed, adjacent to the highway 101 and 46 east intersection.
A release by the Paso Robles fire department says they were able to contain the blaze to about a third of an acre. About 27 firefighters were needed to extinguish the blaze, with traffic control assistance by CHP.
The cause of the fire is still under investigation.