https://www.motorsportreg.com/events/50th-annual-cascade-enduro-for-drivers-portland-intl-raceway-sports-car-508644 : 2-hour mini enduro season finale. 4-hour and 8-hour endurance races. LeMans start. 50th running of the CSCC Enduro. Registration opens May 1st - Check out our website for updates! www.cascadesportscarclub.org