| Date | Cruisers | Thunder Truck | IMCA Hobby Stock | |
| 4/25/1998 | Oehlsen/Oehlsen | Jamie Weishaar | Jeremy Mills | Season Opener |
| 5/2/1998 | RAIN | |||
| 5/9/1998 | ? | ? | Clint Jensen | |
| 5/16/1998 | ? | Jamie Weishaar | Randy Hadacek | |
| 5/23/1998 | Alrich/Moots | Jamie Weishaar | Brad Bakken | |
| 5/30/1998 | Moots/Haeberlin | Jamie Weishaar | Brad Bakken | |
| 6/6/1998 | Moots/Haeberlin | Jamie Weishaar | Jeremy Mills | |
| 6/13/1998 | Grage/Haupt | Jamie Weishaar | Jeremy Mills | |
| 6/20/1998 | RAIN | |||
| 6/27/1998 | Aldrich/Miller | Jamie Weishaar | Jeremy Mills | |
| 7/4/1998 | Aldrich/Miller | Jeff Frambach | Jeremy Mills | |
| 7/11/1998 | Krug/Erpelding | Marlin Strueker | Brad Bakken | |
| 7/18/1998 | Grage/Haupt | Jeff Frambach | Jeremy Mills | |
| 7/25/1998 | Aldrich/Aldrich + Burtis/Householder | Marlin Strueker | Jeremy Mills | |
| 8/1/1998 | Burtis/Householder | Jim Wickman | Jeremy Mills | |
| 8/8/1998 | Walker/Enger | Jeff Frambach | Cary Heinen | Fair Race |
| 8/15/1998 | Burtis/Householder + Walker/Enger | Jamie Weishaar | Jeremy Mills | Chris Adams – wins Big Bud Shootout |
| 8/22/1998 | Burtis/Householder + Grage/Haupt | Jim Wickman | Rob Hughes | |
| 8/29/1998 | Maasdam/Robb | Jamie Weishaar | Jeremy Mills | Season Championship |
| Season Champs | Aldrich/Miller | Ramon Sidles | Jeremy Mills | |
| Fall 1998 | Burtis/Householder | Jim Wickman | Rob Hughes | Schattschneider Memorial |
| Date | IMCA Stock Cars | IMCA Modifieds | |
| 4/25/1998 | Mark Jones | Mark Noble | Season Opener |
| 5/2/1998 | |||
| 5/9/1998 | Ed Wolf | David Wickman | |
| 5/16/1998 | Craig Gray | Rob Rose | |
| 5/23/1998 | Craig Gray | Jack Byers | |
| 5/30/1998 | Craig Gray | Mike Hejna | |
| 6/6/1998 | Dave Erpelding | Kevin Berte | |
| 6/13/1998 | Bruce Wickman | Mike Hejna | |
| 6/20/1998 | |||
| 6/27/1998 | Rain | Rain | |
| 7/4/1998 | Ed Wolf | Ron Pope | |
| 7/11/1998 | Craig Gray | Loren Pesicka Jr. | |
| 7/18/1998 | Craig Gray | Kevin Berte | |
| 7/25/1998 | Craig Gray | Al Hejna | |
| 8/1/1998 | Craig Gray | Chris Adams | |
| 8/8/1998 | Craig Gray | Joe Schmitt | Fair Race |
| 8/15/1998 | Bruce Wickman | Denny Anderson | Chris Adams – wins Big Bud Shootout |
| 8/22/1998 | Brad Gorham | Al Hejna | |
| 8/29/1998 | Dave Erpelding | Al Hejna | Season Championship |
| Season Champs | Dave Erpelding | Denny Anderson | |
| Fall 1998 | Bruce Wickman | Mark Noble | Schattschneider Memorial |
