Features Las Vegas Supercross Live Stream And TV Schedule – How To Watch By Charles Owens - May 3, 2013 0 186 Facebook Twitter Google+ Pinterest WhatsApp The Supercross season wraps up tonight in Las Vegas. Tune in here starting at 4:15pm ET, LIVE practice/qualifying runs until 8:00pm ET. Be sure to catch the live racing on Speed TV starting at 9:30pm ET.