The Harris Clash is an annual racing event held in early August.
It is widely regarded as being one of the best IMCA modified races in the country, drawing hundreds of cars and thousands of fans every year.
The IMCA Late Models are no longer included in the Harris Clash event.
It was announced that the 2018 Harris Clash would be moved to the Deer Creek Speedway, in Spring Valley, MN.
It was announced in 2024, that the 2025 Harris Clash would be moved back to central Iowa and be held at the Boone Speedway.