Complete Thursday qualifying results for the fourth round of the 2006 Atlantic Championship at Portland.

1. Simon Pagenaud Team Australia Swift-Cosworth 1min 05.700secs
2. Carlos Mastretta Brooks Associates Racing Swift-Cosworth 1min 05.791secs
3. Graham Rahal Mi-Jack Conquest Racing Swift-Cosworth 1min 05.852secs
4. Joe D'Agostino Newman/Wachs Racing Swift-Cosworth 1min 05.860secs
5. Raphael Matos Sierra Sierra Enterprises Swift-Cosworth 1min 05.884secs
6. Leonardo Maia Forsythe Racing Swift-Cosworth 1min 05.972secs
7. Alan Sciuto Polestar Racing Group Swift-Cosworth 1min 05.976secs
8. Jonathan Bomarito PR1 Motorsports Swift-Cosworth 1min 06.080secs
9. Tim Bridgman Epsom Team Jensen Swift-Cosworth 1min 06.165secs
10. Andreas Wirth Forsythe Racing Swift-Cosworth 1min 06.246secs

11. Steve Ott Jensen MotorSport Swift-Cosworth 1min 06.253secs
12. James Hinchcliffe Forsythe Racing Swift-Cosworth 1min 06.276secs
13. Robbie Pecorari Gelles Racing Swift-Cosworth 1min 06.330secs
14. Richard Philippe Forsythe Racing Swift-Cosworth 1min 06.373secs
15. Daniel Gaunt Newman/Wachs Racing Swift-Cosworth 1min 06.409secs
16. Ryan Lewis Mi-Jack Conquest Racing Swift-Cosworth 1min 06.449secs
17. Barton Mawer Transnet Racing Swift-Cosworth 1min 06.504secs
18. Alex Garcia Transnet Racing Swift-Cosworth 1min 06.512secs
19. Danilo Dirani Condor Motorsports Swift-Cosworth 1min 06.573secs
20. Alex Barron Polestar Racing Group Swift-Cosworth 1min 06.604secs

21. Alex Sperafico Brooks Associates Racing Swift-Cosworth 1min 06.724secs
22. James Davison Team Australia Swift-Cosworth 1min 06.755secs
23. David Martinez US RaceTronics Swift-Cosworth 1min 07.018secs
24. Anotnio Bessette Gelles Racing Swift-Cosworth 1min 07.047secs
25. Justin Sofio Mathiasen Motorsports Swift-Cosworth 1min 07.219secs
26. Duncan Ende Bite Racing Swift-Cosworth 1min 07.902secs
27. Kyle Kelley McAfee Motorsports Swift-Cosworth 1min 08.034secs