At 7:05 p.m., Holland Township police and firefighters responded to Milford Warren Glen Road to treat the 15-year-old, the Hunterdon County Prosecutor's Office said.
The operator of the dirt bike was transported by helicopter to Leigh Valley Hospital-Cedar Crest in Allentown and remains in serious condition, authorities said. The dirt bike was not equipped with lights or reflectors, was not intended for use on a roadway, and the driver was not licensed to operate a motorcycle, authorities said.
The crash was investigated by the Holland Township Police Department and the Hunterdon County Prosecutor's Office. No charges have been filed, authorities said.
Click here to follow Daily Voice Parsippany-Troy Hills and receive free news updates.