Massachusetts State Police busted a Maine woman for with 300 bundles of heroin on Thursday. 

Troopers were on Route 495 in Bolton when they spotted a Nissan Altima headed north at a high rate of speed. They pulled over the driver and determined that Holly Grant, 39, of Palermo, Maine, was driving without a license. 

Troopers searched the car and found 300 bundles of heroin. 

RELATED: Billerica cop busted for 2013 assault incident

Grant was charged with speeding, driving without a license, distribution of a Class A substance, and trafficking heroin. She was held on $25,000 bail. She will be arraigned in Clinton District Court on Friday.