The 2005–06 A1 Grand Prix of Nations, United States of America was an A1 Grand Prix race, held on the weekend of March 12, 2006 at Laguna Seca.
The first American stop for the A1GP (and so far only) was doomed to fail from the start. The race was announced before Laguna Seca announced it. There was little to no advertisement for the event, and very few fans of European open wheel racing in America even knew about the event. Due to constant rain, the A1GP weekend was canceled by the track a week before the race. The rain stopped, but the ground was still soaked to the point that most of the parking lots were closed in fear of vehicles getting stuck in the mud. Laguna Seca is located just a few miles from the Monterey Bay, and is at an elevation of about 750 feet. The weather chased away more fans as snow fell on Friday night.
Fewer than 2000 people (estimate) attended the race.
Qualifying was held in "ideal" conditions compared to the rest of the weekend and the lap times were quick.
With rain nearby, officials changed the start times for both races. Temperatures were in the 40s, and the diehard fans were in for quite a show. Less than five minutes before the start, a torrent rain storm hit the track hard. Teams quickly switched to rain tires and put on a great show. By the halfway point of the 30 minute sprint race, the rain stopped, yet there was enough water that a dry line could not be found.
By the start of the main race, the track was mostly dry, however there were enough wet spots on the track to make it dangerous for slicks. Many cars spun hitting the wet curbs. There were also some questionable calls by the officials causing Jos Verstappen to storm out of his car in the middle of the race.
Qualifying took place on Saturday, March 11, 2006.
1. Mexico Salvador Duran 2min 30.744secs2. France Nicolas Lapierre 2min 30.895secs3. New Zealand Matt Halliday 2min 31.596secs4. Malaysia Alex Yoong 2min 31.810secs5. Australia Ryan Briscoe 2min 31.964secs6. Great Britain Robbie Kerr 2min 31.970secs7. Portugal Alvaro Parente 2min 32.042secs8. Ireland Ralph Firman 2min 32.098secs9. Germany Timo Scheider 2min 32.307secs10. South Africa Stephen Simpson 2min 32.535secs11. Lebanon Graham Rahal 2min 32.560secs12. Netherlands Jos Verstappen 2min 32.571secs13. Italy Max Papis 2min 32.745secs14. Czech Republic Tomáš Enge 2min 32.838secs15. Indonesia Ananda Mikola 2min 33.249secs16. Switzerland Giorgio Mondini 2min 33.299secs17. USA Bryan Herta 2min 33.602secs18. Canada Patrick Carpentier 2min 33.641secs19. Brazil Christian Fittipaldi 2min 33.686secs20. Austria Mathias Lauda 2min 34.338secs21. Pakistan Adam Khan 2min 36.325secs22. China Tengyi Jiang 2min 37.715secs
The Sprint Race took place on Sunday, March 12, 2006.
| Pos | Team | Driver | Laps | Time | Points | |
|---|---|---|---|---|---|---|
| 1 |  Mexico | Salvador Durán | 16 | 31:07.422 | 20 | |
| 2 |  France | Nicolas Lapierre | 16 | +1.771 | 10 | |
| 3 |  Portugal | Alvaro Parente | 16 | +8.040 | 18 | |
| 4 | Great Britain | Robbie Kerr | 16 | +12.791 | 15 | |
| 5 |  Ireland | Ralph Firman | 16 | +24.390 | 11 | |
| 6 |  Canada | Patrick Carpentier | 16 | +26.027 | 11 | |
| 7 |  Germany | Timo Scheider | 16 | +26.416 | 13 | |
| 8 |  New Zealand | Matt Halliday | 16 | +30.474 | 3 | |
| 9 |  United States | Bryan Herta | 16 | +31.034 | 2 | |
| 10 |  Australia | Ryan Briscoe | 16 | +34.647 | 4 | |
| 11 |  South Africa | Stephen Simpson | 16 | +35.971 | ||
| 12 |  Austria | Mathias Lauda | 16 | +51.760 | ||
| 13 |  Brazil | Christian Fittipaldi | 16 | +54.200 | ||
| 14 |  Netherlands | Jos Verstappen | 16 | +55.266 | ||
| 15 |  Pakistan | Adam Khan | 16 | +57.676 | ||
| 16 |  Switzerland | Giorgio Mondini | 16 | +1'00.478 | ||
| 17 |  China | Tengyi Jiang | 16 | +1'13.008 | ||
| 18 |  Czech Republic | Tomáš Enge | 15 | +1 Lap | ||
| 19 |  Italy | Max Papis | 15 | +1 Lap | ||
| 20 |  Indonesia | Ananda Mikola | 12 | +4 Laps | ||
| 21 |  Lebanon | Graham Rahal | 9 | +7 Laps | ||
| 22 |  Malaysia | Alex Yoong | 7 | +9 Laps |
The Main Race took place on Sunday, March 12, 2006.
1. Mexico Salvador Duran 1 h 0 min 52.974 s; 40 laps2. Germany Timo Scheider +2.042 s3. Great Britain Robbie Kerr +3.117 s4. Portugal Alvaro Parente +10.420 s5. Canada Patrick Carpentier +14.183 s6. Ireland Ralph Firman +20.805 s7. Italy Max Papis +23.199 s8. Australia Ryan Briscoe +24.236 s9. Austria Mathias Lauda +29.229 s10. Malaysia Alex Yoong +30.072 s11. Pakistan Adam Khan +31.391 s12. New Zealand Matt Halliday +31.977 s13. Switzerland Giorgio Mondini +2 laps14. France Nicolas Lapierre +3 laps15. USA Bryan Herta +3 laps16. Czech Republic Tomáš Enge +6 laps17. China Tengyi Jiang +7 laps18. Brazil Christian Fittipaldi +11 laps19. Indonesia Ananda Mikola +12 laps20. Lebanon Graham Rahal +13 laps21. Netherlands Jos Verstappen +23 laps22. South Africa Stephen Simpson +37 laps