The collision happened, on the B5289 between Keswick and Borrowdale, at about 5.30pm on Saturday.

The 17-year-old boy injured was from out of the area.

He was flown to the Royal Victoria Infirmary, Newcastle, by the Great North Air Ambulance.

The rider of the motorbike was a 24-year-old man from west Cumbria.

A spokesman for Cumbria police said:" The pedestrian is in a stable condition."

The road was closed for several while collision investigators examined the scene.

Witnesses should call police on 101.