The Thunderbird Circuit Race, often simply called the "Thunderbird," serves as the traditional Spring Series Opener for the competitive road cycling season in British Columbia's Lower Mainland.

• When: Typically held on a Sunday in early March, making it one of the very first races of the year.

• Where: The race takes place on a relatively flat and fast circuit course located in the Langley area of BC, often in the rural Township of Langley.

• What: It is a circuit race (a set number of laps on a closed-loop course, rather than a point-to-point road race), challenging riders with its high speeds and competitive pace as they shake off their winter training.

• Organizer: The event is usually organized by Local Ride Racing and is sanctioned by Cycling BC.

The Thunderbird is a crucial early-season test for local cycling clubs and a popular target for racers aiming to start the competitive year strong.