Thousands of biker riders are arriving in Tulsa for the BMX Grand Nationals.
The QuikTrip Center is being transformed into a race course after more than 800 truckloads of dirt was brought in for the track.
This is the 15th year for the competition to be held in Tulsa.
It attracts nearly 3,000 participants and more than 8,000 spectators from all over the world.
Practice will begin on Thursday, with competition on Friday, Saturday and Sunday.
Olympians from 2008 and 2012 will join some of the biggest names in BMX in the Pro Spectacular Saturday evening at 6:00.
Tickets for the Saturday event are $10.00. Most other events are free.