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.
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