 Letter Buck. Wednesday, September 11th through Saturday, September 14th in the afternoons at America's 10-time large outdoor rodeo of the year, the iconic Pendleton Roundup. After the rodeo, Happy Canyon Indian Mansion tells the Oregon Trail story with a cast of hundreds. It's America's oldest Wild West show. Then dance the night away at Goldie's Bar at the Canyon. Pendleton, Oregon, September 7th through the 14th. Buy tickets now at PendletonRoundup.com. On with the show. And Letter Buck.