Step inside one of the wildest and largest motorcycle rallies in the world, Sturgis.

Witness the evolution of the motorcycle and the men who refused to give up on the American dream in Discovery's Harley And The Davidsons.

Walter Davidson suggests a few enhancements to Arthur Davidson and Bill Harley's motorbike - make it bigger, and faster!

Reporter Clara Biesel is writing an article about the dangers of riding a motorcycle. Arthur Davidson doesn't seem too concerned with the bad press.

The Harley-Davidson founders enter one of their early motorcycle prototypes in a dangerous enduro race through the woods.

Motordrome racing was invented in the early 20th century as a way to push motorcycles to their top speed limits. It didn’t last long – the sport proved to be extremely dangerous.

Meet the motorcycle enthusiasts from the Sturgis Motorcycle Rally and find out why they ride.

Welcome to the 76th annual Sturgis Motorcycle Rally.

Find out how the teams recreated the iconic motorcycles featured in Harley and the Davidsons.

Hear from the stars of Harley and the Davidsons about how they prepared for the roles of Walter Davidson, Arthur Davidson, and William Harley.

Walter Davidson makes a big bet with the president of a rival motorcycle company. It’s time to bring the competition back to dirt track racing!

Arthur Davidson sets out to assemble a team of Harley-Davidson racers - talented riders with enough charisma to draw a crowd. They would soon be known as the Wrecking Crew.

17-year-old Shrimp Burns makes a big impression in his first race on Harley-Davidson’s team.

After adding some flair to motorcycle racing, Arthur Davidson begins to see what the future of their company may look like.

Bill Harley and the Davidson brothers receive news that will change their whole industry - America has entered the Great War.

Stephen Rider plays William B. Johnson, the world’s first African American Harley-Davidson dealer, and the first African American licensed to compete in national motorcycle racing events.

The Harley-Davidson founders enter one of their early motorcycle prototypes in a dangerous enduro race through the woods.

Welcome to the 76th annual Sturgis Motorcycle Rally.

Witness the evolution of the motorcycle and the men who refused to give up on the American dream in Discovery's Harley And The Davidsons.

Motordrome racing was invented in the early 20th century as a way to push motorcycles to their top speed limits. It didn’t last long – the sport proved to be extremely dangerous.

Walter Davidson makes a big bet with the president of a rival motorcycle company. It’s time to bring the competition back to dirt track racing!

Hear from the stars of Harley and the Davidsons about how they prepared for the roles of Walter Davidson, Arthur Davidson, and William Harley.

Arthur Davidson sets out to assemble a team of Harley-Davidson racers - talented riders with enough charisma to draw a crowd. They would soon be known as the Wrecking Crew.

Find out how the teams recreated the iconic motorcycles featured in Harley and the Davidsons.

17-year-old Shrimp Burns makes a big impression in his first race on Harley-Davidson’s team.

After adding some flair to motorcycle racing, Arthur Davidson begins to see what the future of their company may look like.

Bill Harley and the Davidson brothers receive news that will change their whole industry - America has entered the Great War.

Just like his father at his age, Walt Davidson has a need for speed. After "borrowing" a Harley-Davidson prototype, he heads for an underground race.

Walter Davidson offers his son a major opportunity: work in the Harley-Davidson front office. To his surprise, Walt isn't exactly receptive to the idea.

Deep into the Great Depression, Harley and the Davidsons make a bold move and test a new prototype with an even more impressive engine.

After receiving some tragic news, Bill, Arthur, and Walter ponder the legacy they will leave behind for future generations.

Walter visits a group of independent motorcycle builders, who are impressed by the stories they've heard of Walter's racing days.