Every summer, an adult soapbox derby competition happens at Mt. Tabor Park. You can sign up as a racer and possibly win an award for speed or design. Be careful as a gawking bystander, some cars lose control and plow through barriers. Best thing of all: the competition is free for the community. A lot of people pack water, a lunch, and a picnic blanket when attending the event. #culture #portland #portlandoregon