He suffered multiple trauma injuries when he swerved to miss a kangaroo and hit a tree stump, and was then thrown off the bike and hit a tree.
The boy was airlifted to Nambour Hospital in a serious but stable condition.
Also on Sunday, the Sunshine Coast based RACQ LifeFlight Rescue helicopter flew to Murgon Hospital to airlift a 14 year old male suffering from leg and possible spinal injuries after coming off a dirt bike. He travelled to Nambour Hospital in a stable condition.