:Clean Harbors 150

File:Corn_Belt_150_logo.png

In 2013, the Camping World Truck Series raced the Eldora Dirt Derby at Eldora Speedway in NASCAR's first national touring series dirt track race since 1970;{{Cite news |last=Billing |first=Greg |date=November 28, 2012 |title=Eldora to host first NASCAR dirt race since 1970 |work=Dayton Daily News |url=https://www.daytondailynews.com/sports/eldora-host-first-nascar-dirt-race-since-1970/me9nP9rvfp7oOckb8a6BsO/ |access-date=January 7, 2021}} the event ran from 2013 to 2019, before being canceled in 2020 due to the COVID-19 pandemic, and then not renewed for 2021 as NASCAR shuffled its national touring series schedules.{{Cite news |last=Orner |first=Ben |date=November 18, 2020 |title=Ohio's famed Eldora Speedway loses NASCAR race, gains event in owner's new series |publisher=WCMH-TV |url=https://www.nbc4i.com/sports/local-sports/ohios-famed-eldora-speedway-loses-nascar-race-gains-event-in-owners-new-series/ |access-date=January 2, 2021}}

On November 19, 2020, NASCAR revealed the 2021 Camping World Truck Series schedule, which featured two dirt-track events, one being the Pinty's Dirt Truck Race at Bristol Motor Speedway in March, and the other at Knoxville Raceway in Iowa,{{Cite news |last=Estrada |first=Chris |date=December 15, 2020 |title=How Knoxville Raceway made the 2021 NASCAR Truck Series schedule |work=The Athletic |url=https://theathletic.com/2259153/2020/12/15/knoxville-raceway-nascar-trucks-2021/ |access-date=January 11, 2021}} a historic one-half-mile dirt oval track that began competition in 1901 and is best known for hosting the Knoxville Nationals sprint car championships, which led to the moniker "Sprint Car Capital of the World".{{Cite web |last=Pryson |first=Mike |date=November 20, 2020 |title=NASCAR Camping World Truck Series Schedule for 2021 Includes 2 Dirt Short Tracks |url=https://www.autoweek.com/racing/nascar/a34733507/nascar-camping-world-truck-schedule-for-2021-includes-legendary-dirt-short-track/ |access-date=January 11, 2021 |website=Autoweek}}

The event, scheduled to take place on July 9, has the NASCAR Camping World Truck Series anchoring the weekend's races, accompanied by the Brandt Professional Agriculture Corn Belt Clash for the United States Auto Club's AMSOIL National Sprint Car Series and the POWRi W.A.R. Sprint Car Series.{{Cite news |date=November 19, 2020 |title=NASCAR truck race coming to Knoxville Raceway |publisher=KCCI |url=https://www.kcci.com/article/nascar-truck-race-coming-to-knoxville-raceway-iowa/34731132 |access-date=January 11, 2021}} The race, scheduled to run for 150 laps on the half-mile dirt track,{{Cite news |last=Birch |first=Tommy |date=November 19, 2020 |title=NACAR Truck Series coming to Knoxville Raceway in 2021 |work=Des Moines Register |url=https://www.desmoinesregister.com/story/sports/motor/auto-racing/2020/11/19/nascar-truck-series-knoxville-raceway-dirt-track-racing/6343437002/ |access-date=January 11, 2021}} is the first time an event sanctioned by one of NASCAR's national touring series – the NASCAR Cup Series, Xfinity Series, and Camping World Truck Series – has been held in the history of Knoxville Raceway.{{Cite web |date=November 19, 2020 |title=Knoxville Raceway to Host NASCAR Truck Series in 2021 |url=https://www.dirttrackdigest.com/knoxville-raceway/2020/11/19/knoxville-raceway-to-host-nascar-truck-series-in-2020/ |access-date=January 11, 2021 |publisher=Dirt Track Digest}}{{Cite web |date=November 19, 2020 |title=Knoxville Raceway Headlines Truck Series Calendar |url=https://speedsport.com/nascar/truck-series/knoxville-raceway-headlines-truck-series-calendar/ |access-date=January 11, 2021 |website=Speed Sport}} On June 25, 2021, the association of Iowa Chevrolet dealerships (Premier Chevy Dealers) was announced as the presenting sponsor of the 150-lap race.{{cite web |url=https://www.jayski.com/2021/06/25/premier-chevy-dealers-partners-with-knoxville-raceway-to-present-inaugural-nascar-truck-series-event/ |title=Premier Chevy Dealers partners with Knoxville Raceway to present inaugural NASCAR Truck Series event |website=Jayski's Silly Season Site |publisher=NASCAR Digital Media, LLC |date=June 25, 2021}}

In 2022, the race was moved from July (on the same weekend as the Cup and Xfinity Series races at Atlanta) to June (on the only off weekend of the year for the Cup Series and Xfinity Series off weekend). On April 29, 2022, Clean Harbors was announced as the race's title sponsor.{{cite web |url=https://www.jayski.com/2022/04/29/truck-series-race-at-knoxville-raceway-named-clean-harbors-150/ |title=Truck Series Race at Knoxville Raceway Named Clean Harbors 150 |website=Jayski's Silly Season Site |publisher=NASCAR Digital Media, LLC |date=April 29, 2022}}

The race was removed from the schedule in 2023

File:Knoxvilleraceway-frontgrandstands.jpg

• 2021: The race was extended due to a NASCAR Overtime finish.

{{reflist}}

• {{Racing-Reference track|Knoxville_Raceway|Knoxville Raceway}}

{{NASCAR next race

| Series = NASCAR Camping World Truck Series

| Race = Clean Harbors 150

| Previous_race = DoorDash 250

| Next_race = Rackley Roofing 200

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{{NASCAR Truck Series races}}

Category:NASCAR Truck Series races

Category:Annual sporting events in the United States