Tri State Pro Stock Challenge Series competes on dirt tracks throughout the Western United States, with a rules package that allows drivers to designate their home track rulebook when competing.

The series competes at venues such as: Antioch Speedway (CA), Cedarville Speedway (CA), Diamond Mountain Speedway (CA), Fernley 95A Speedway (NV), Keller Auto Speedway (CA), Petaluma Speedway (CA), Rattlesnake Raceway (NV), Siskiyou Golden Speedway (CA), and Stockton 99 Dirt Track (CA).

In 2020, Tri State Pro Stock racers raced for no less than $1,000 to win at each round with a series-wide car count average of 20 cars per event. A record 27 Pro Stocks competed in the Al Miller Memorial at Antioch on October 31st.