The Pikes Peak International Hill Climb is one of the world's premier mountain climbs, attracting top-tier competition showcased by the diverse array of participating cars.

With a rich history dating back to its inception in 1916, this iconic race has evolved into a thrilling spectacle featuring various divisions catering to two- and four-wheeled vehicles.

The Pikes Peak Hill Climb boasts a broad spectrum of vehicles, encompassing two- and four-wheeled marvels. In two-wheeled race cars, participants contend in the Pikes Peak Heavyweight, Middleweight, and Lightweight classes, offering a dynamic showcase of speed and skill.

On the four-wheeled front, the race sees a remarkable amalgamation of cars, ATVs, prototypes, open-wheel racers, electric vehicles, and even tractor-trailers. The race's lenient regulations have provided a platform for many current and retired rally and drag racing cars to exhibit prowess on the challenging Pikes Peak course.

Presently, the Pikes Peak International Hill Climb's four-wheeled racing divisions encompass the Unlimited, Pikes Peak Open, Time Attack 1, Porsche Pikes Peak Trophy by Yokohama, Open Wheel, and Exhibition categories, creating six distinctive classes that cater to a broad range of automotive capabilities.

The Unlimited Division stands out as the most open class in the Pikes Peak International Hill Climb, where cars compete with minimal restrictions on technical specifications, provided they adhere to race safety rules.

This category boasts the highest power outputs and most exaggerated dynamics and frequently witnesses the establishment of the fastest speeds and records. The Unlimited Division often serves as a stage for some of the world's most exotic and custom-built racing cars.

Pikes Peak Open class is tailored for production cars but without constraints on the extent of modifications allowed. This class permits significant alterations to the vehicle's engine, transmission, and suspension systems. It enables adding aerodynamic components to the stock body, creating a platform for innovation and performance.

Open-wheel racing, a traditional category since the race's inception, integrates Formula One and Baja Off-Road Racing vehicles. Limited to single-engine, single-seat, open-wheel, open-cockpit, two- or four-wheel drive cars, the Open Wheel Division adds a touch of heritage to the event.

The Demonstration Class has consistently been a stage for showcasing cutting-edge technology in motorsports and automotive engineering. This class encourages manufacturers and race car builders to submit prototypes or pre-production vehicles.

Often featuring particular design concepts or innovative mechanical technology, cars in this category can earn recognition and awards while not vying for records due to their showcase nature.

Aside from the challenges posed by gradients and corners, the thin air of the alpine region presents a formidable test for both drivers and cars.

As drivers ascend towards the peak, they grapple with the physical toll exacted by the high-altitude environment, depleting their physical strength and concentration. The impact of this thin air on driver reactions during the race adds a layer of complexity to the already demanding course.

The Pikes Peak International Hill Climb is a testament to automotive diversity and performance, where a rich history intertwines with cutting-edge technology. This iconic race continues to captivate audiences worldwide, offering an unparalleled showcase of skill, innovation, and the indomitable spirit of competition against the breathtaking backdrop of Pikes Peak.