Pendleton Round-Up Association, Inc. Pendleton Round-Up Association, Inc. Search | Advanced Search | New Members | Coupons and Discounts | All Categories Other >> Festivals & Events Pendleton Round-Up Association, Inc. PO Box 609Pendleton, OR 97801 | map | directions (541) 276-2553 Visit Site Connect With Us Hours: M-F 8:30-5; Sat 10-4 The world Famous Pendleton Round-Up is held the second full week in September of each year. It is a large, outdoor PRCA rodeo. Member Since: 1996