Cal Fire received a report early Wednesday morning of a fire on the 5100 block of Creston Valley road near highway 41.
Firefighters arrived to find a barn fully engulfed in flames, alongside two trailers and vegetation burning.
Cal Fire, Atascadero and Paso Robles firefighters quickly contained the blaze to one eighth of an acre of vegetation, and extinguished the fire on the barn and trailers.
Cal Fire says no injuries were reported, but the cause is unknown.
