The Black Hills Motor Classic motorcycle rally in Sturgis, the single biggest motorcycle event in the world, drawing in close to a half a million bikers each August, has helped the small South Dakota town to become known as "Motorcycle City USA".

However, many Native Americans say the event threatens the sanctity of one of their holiest sites and the founding place of religion for several tribes of Plains Indians: the Bear Butte Mountain.

Al Jazeera's Daljit Dhaliwal reports from the Black Hills of South Dakota.