UPDATE (9:11 p.m.) - CA State Parks says crews have located an adult male who reportedly fell while hiking the Bluff Trail.
Officials say they are helping him walk back the trailhead.
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ORIGINAL STORY (9:11 p.m.) - Crews are responding to reports of a possible missing and injured hiker at Montaña de Oro State Park.
CAL FIRE SLO says reports came in around 9 p.m.
CAL FIRE SLO, CA State Parks and the SLO County Sheriff's Office are responding.
This is a developing story, check back later for details.