Final answer:
The first Ponoka Stampede was held in 1936 and it is an annual rodeo event in Ponoka, Alberta, unrelated to the ancient Head-Smashed-In buffalo jump site.
Step-by-step explanation:
The first Ponoka Stampede took place in the year 1936. It has since become one of western Canada's premier rodeo events, held annually in Ponoka, Alberta. While the question referenced the Head-Smashed-In buffalo jump site, which is a historical site in Alberta that came into use around 5,700 years ago, it does not correlate directly to the Ponoka Stampede. The buffalo jump is a separate historical site, where Indigenous peoples used the landscape to hunt buffalo by driving them off a cliff, leaving a significant archaeological record with layers of bones.