A 50-YEAR-old man lay injured and unaccounted for on a rough bush track in central Queensland for six hours on Sunday before being found.

The man went quad bike riding near Yerra, about 27 kilometres south-west of Maryborough, on Sunday morning, but did not arrive at his destination.

His family searched for the 50-year-old for most of the day and raised the alarm when they found him in bushland about 3pm, Brisbanetimes reports.

He was suffering serious pelvic injuries after rolling the quad bike about six hours earlier.

An intensive care paramedic from the RACQ CareFlight Rescue helicopter stabilised the man at the scene, before he was flown to Bundaberg Base Hospital.

Earlier, an injured trail bike rider was winched to safety by the Sunshine Coast crew of RACQ CareFlight Rescue.

The 52 year old was riding through a heavily forested area at Mt Mee when he lost control and crashed on Sunday morning.

RACQ CareFlight flew to the scene and winched its critical care Doctor and Intensive Care Paramedic down to the Brisbane man.

He was treated for an upper leg fracture and possible spinal injuries before being strapped into a stretcher and winched on board the helicopter.

The man was airlifted to the Royal Brisbane and Women's Hospital in a stable condition.

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