Dallas Montes was the runner-up in his West Series debut. Hannah Newhouse, a 15-year-old making her West Series debut, was sixth.
Thorn started seventh and worked his way to the lead holding off Montes and Eric Holmes in a green-white-checkered flag finish in the NAPA Auto Parts 150.
Greg Pursley was eighth and leads the West Series standings by 13 points over teammate Dylan Kwasniewski.
Go to the K&N website for more on the West Series race from Albuquerque, N.M.
Photo: Derek Thorn won the NASCAR K&N Pro Series West race at NAPA Speedway in New Mexico. (Credit: Getty Images for NASCAR)
