The Ultimate Callout Challenge (UCC) is a premier event in the diesel motorsports world, drawing in enthusiasts, competitors, and fans from across the country. Held annually at the Lucas Oil Raceway Park in Indiana, UCC brings together some of the most powerful, high-performance diesel trucks to battle it out in a series of grueling events.
At its core, the Ultimate Callout Challenge is a world-class, multi-discipline competition for some of the most powerful diesel trucks on earth.
It’s the perfect stage for builders to showcase their talent—and for fans to see what these insane machines are truly capable of.
Competitors must excel in several categories that test the trucks’ abilities to perform in different ways, including sled pulling, drag racing, and a dyno competition. The ultimate goal is to crown a UCC winner—meaning the truck and team that outperforms all others across these varied challenges.
Key Events at UCC
Make no mistake, UCC is not your average truck event—it’s a combination of various motorsports disciplines, each designed to test different aspects of a diesel truck’s capabilities. Here’s a breakdown of the major events:
1. Sled Pulling
Sled pulling is one of the most iconic events in all of diesel motorsports. At UCC, some of the baddest diesel trucks in the country go head-to-head on the pulling track.
Whether they win, break, or both, the sled pull event is a serious mechanical challenge for competitors. The stress applied to these trucks is far beyond what they were originally built for.
Even with the best parts and builders available, you’re guaranteed to see some carnage.
2. DRAG RACING
The drag racing portion of UCC is a major crowd pleaser. From purpose-built race trucks to nearly-stock daily drivers, you’ll see a massive variety of trucks hit the track.
Pass after pass, dozens and dozens of modified diesels lay it on the line for pride, points, or both. There’s a reason so many UCC attendees spend the whole weekend at the drag strip!
3. DYNO COMPETITION
A key component of the UCC is the dyno competition, where competitors test the horsepower and torque output of their rigs. It’s not uncommon for UCC competitors to break 2,500+ horsepower or more—though it can come at a cost.
If you hear an explosion at UCC, it’s most likely a truck coming apart in catastrophic fashion on the dyno. A quick Google search for “UCC dyno explosion” will tell you all you need to know.
5 Events in 1
As mentioned above, UCC is much, much more than a competition. From the massive truck show to the burnout competition, to the crowd-favorite Poor Diesel Challenge, there’s something for everyone.
You don’t need a 1,000+ horsepower truck to have a great time at UCC—it’s truly an event for any diesel enthusiast.
UCC has become a celebration of diesel culture, where enthusiasts can connect, share knowledge, and appreciate some of the best-built diesel trucks on the planet.
UCC’s Impact on Diesel Performance
The Ultimate Callout Challenge has had a significant impact on the diesel performance industry. As one of the most prestigious events in the diesel world, it has spurred innovation and helped push the boundaries of what diesel events can be.
The competition encourages manufacturers and enthusiasts to develop new technologies, better components, and fabricators to develop their craft. As diesel motorsports has grown, so too have the capabilities of the trucks involved.
After all, it wasn’t that long ago that a (reasonably) reliable, 1,000hp diesel truck was a ground-breaking concept. In 2025 and beyond, it’s almost standard practice.
And, it’s not just about bragging rights, either—many participants use the event as a springboard to promote their brands, products, and services within the diesel industry.
For some, winning at UCC can elevate a company to new heights, bringing attention from sponsors, potential customers, and the broader automotive community.
See you at UCC!
The Ultimate Callout Challenge is more than just an event—it’s a celebration of the incredible power, performance, and innovation within the diesel world. Whether you’re a competitor, a fan, or just someone who appreciates powerful trucks, the UCC is an unmissable experience that showcases the best of what diesel motorsports has to offer.
With its combination of sled pulling, drag racing, and dyno competition, and so, so much more, it truly lives up to its name. For anyone passionate about the world of diesel performance, the UCC is where the best of the best come to prove their mettle.
