POLICE and SES crews are searching for a solo hiker missing since Thursday after going for a hike up Mount Barney in the Scenic Rim.

Nathanael Green is understood to be 19 and was last heard from when he called triple zero at 1pm Thursday saying he was lost and low on water.

His family have posted on Facebook asking anyone hiking the area to keep an eye out for him.

Nathanael is described as being lean built, 5'11 and with black curly hair and green eyes.

He was wearing a Blue Easts rugby shirt with yellow piping, dark grey athletic shorts and black joggers.

On Saturday morning Area Controller for SES South Eastern Region Danni Bull said SES crews and police were still actively searching for the missing hiker.

More to come.