On May 26, 1973 Wisconsin Rapids driver Lyle Nabbefeldt lost control of his car entering turn one during time trials, crashed into the outside wall and was killed instantly. The Lyle Nabbefeldt Memorial began in 1974 as a tribute to the driver, and it became the Dells' annual marquee event until its last running in the late 1990s. The first running of the event was a 100-lap feature, but the feature format was changed the next year to running two 55-lap features with an overall champion being declared. The change was made to reflect the number 55s that Nabbefeldt ran throughout his racing career. Another unique part of the Nabbefeldt Memorial was the winner's trophy, known as the Nabbefeldt Traveling Trophy. The overall champion of the Nabbefeldt Memorial was allowed to keep the trophy until the following year's running of the race. If any one driver was able to win the Nabbefeldt Memorial three years in a row, that driver would take permanent possession of the trophy and a new one would be introduced. Dick Trickle won the event two years in a row on two occasions, but Rick Wateski is the only driver to have won the event three years in a row (1991/1992/1993). Wayne Lensing, the current owner of Dells Raceway Park, announced that The Nabbefeldt Memorial was being revived for 2015, as part of a series of CWRA Challenge Series races. The track also announced two new marquee Super Late Model events in 2015. The first event was the Icebreaker 100, an event held in April before other tracks opened. The second event was the Falloween 150, which was held in late October after all other late model events in the state of Wisconsin had concluded. In 2020, the
Joe Shear Classic, normally held at
Madison International Speedway, was held at Dells in September as a result of pandemic restrictions in Dane County that restricted Madison to one race in late August with spectators only on the hillside in vehicles. In September of 2021 the ARCA Midwest Tour stop at Dells Raceway Park became the Jim Sauter Classic, a 200-lap feature named in honor of the late veteran Necedah, Wisconsin racer. In 2024, the National Short Track Championship, which had been held at
Rockford Speedway in Illinois since 1966 until its closure and demolition after the 2023 season, was moved to Dells Raceway Park. ==Track records==