Get tickets early for Washougal MX Motocross event happens July 24 at Washougal MX Park By The Columbian Share: Ken Roczen of Germany speeds down a hill during the 450 Class Moto #1 at the Washougal National Lucas Oil Pro Motocross at the Washougal MX Park on Saturday afternoon, July 27, 2019. Roczen placed second in the 450 Class. (Alisha Jucevic/The Columbian) The always popular Washougal MX National is back on and fast approaching. Round 7 of the Lucas Oil Pro Motocross Championships is scheduled for July 24 as the capper to a week of events at the Washougal MX Park dirt track. After having to cancel in 2020 due to the pandemic, ticket sales for general admission are limited for 2021 in order for the park to stay below guidelines due to the continuing pandemic.