A dirt bike rider was injured Saturday afternoon at the Switchback Raceway on Route 8 in Clay Township, authorities said.

The motorcyclist, believed to be in his 20s, was flown by medical helicopter to a Pittsburgh hospital with an apparent broken leg.

The accident happened about 1:30 p.m. as the man was completing a jump on the track. He was injured, according to emergency crews, when the bike landed.

“He was on the side of the track when we got there,” said Dan Bunyan, chief of the West Sunbury Volunteer Fire Department. “His buddies were holding his injured leg.”

Bunyan said it appeared the man suffered a possible broken left femur. He was conscious and alert following the accident. He remembered wrecking but did not know what happened to cause the accident.

State police were not called, and the man's name was not released. A Butler Ambulance Service crew placed his leg in a traction splint, and he was carried off on a back board.

He was taken by ambulance to Unionville fire station at Route 8 and Mahood Road in Center Township where Unionville firefighters set up a landing zone for a STAT MedEvac helicopter.

The helicopter flew him to UPMC Presbyterian hospital. His condition was not known Sunday.

The man's bike, authorities said, appeared to have little if any damage.