The public is invited to join professional cyclists for a criterium race in downtown Tucson Saturday evening.

The OPTUM/TMC Old Pueblo Grand Prix begins with a kids bike race and community bike parade at 5 p.m. in front of St. Augustine Cathedral, 192 S. Stone Ave.

Also included in the evening will be cruiser drag races and a halftime BMX stunt exhibition by two local BMX pros.

The final event of the night will be a Pro and Cat 1 men's race at 8 p.m.

Now in its third year, the event is expected to bring in both national and international athletes.

With a purse of $23,000, organizers say thousands of spectators, plus a large vendor expo, are expected to be part of the event.

For more information, go to oldpueblograndprix.com