2005 Wisconsin Challenge Series Winners
Winners
| Track | Driver |
| Dells Motor Speedway | Charlie Menard |
| Jefferson Speedway | POSTPONED |
| Madison International Speedway | POSTPONED |
| Wisconsin International Raceway | Nathan Haseleu |
| Jefferson Speedway | Erik Darnell |
| Golden Sands Speedway | Jeff Kendall |
| Wisconsin International Raceway | Jeff VanOudenhoven |
| Dells Motorspeedway | Dexter Bean |
| Marshfield Super speedway | Nathan Haseleu |
| Golden Sands Speedway | Nathan Haseleu |
| Marshfield Super speedway | Eugene Gregorich, Jr |
Season Wins List
| Driver | Wins |
| Nathan Haseleu |
3 |
| Dexter Bean |
1 |
| Erik Darnell |
1 |
| Eugene Gregorich, Jr |
1 |
| Jeff Kendall |
1 |
| Charlie Menard |
1 |
| Jeff VanOudenhoven |
1 |
Final Points
| Driver | Points |
| Nathan Haseleu | 1040 |
| Mark Eswein | 870 |
| Jeff Kendall | 857 |
| Ryan Matthews | 848 |
| Jeremy Lepack | 844 |
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