Saturday night is the second round of the World Supercross rounds. Make sure to listen to the Supercross Live Webcast starting at about 7:00 PM PT/10:00 PM ET. Also on Saturday is the SPEED Channel broadcast of the 125 class race from Toronto at 6:00 PM ET.
Then next-day coverage of the 250 class from Vancouver will be on Sunday night at 6:00 PM ET on SPEED Channel. There's a lot of stuff scheduled for this weekend and I'm confused a little myself, so take a look at the moto calendar to get everything straight so you don't miss it 'cause it's going to be good.