Derek Thorn is an American professional stock car racing driver. He currently competes full-time in the SRL Southwest Tour. He won the championship in the NASCAR K&N Pro Series West with Sunrise Ford Racing in 2013 and again in 2018 in a one-off season with SFR. In 2022, Thorn won the 55th Annual Snowball Derby.

The SRL Southwest Tour Series is a late model stock car racing league operating since 2001. The series is a continuation of the Tri-Track Challenge run in California between 1997 and 2000. The series is also connected to the former Supermodified Racing League, previously headed by Davey Hamilton. Through the years the series expanded its racing calendar as well as racing series adding spec late model series and Legends car racing.