Happy Valley Airport (FAA LID: OL03) is a closed airport located 2 miles southeast of Happy Valley in Clackamas County, Oregon, USA. It was constructed in 1964 as "Troh's Nest" airfield by Hank Troh after he closed his first airport. "Our Landfill Legacy" (PDF). March 2004. Retrieved 2009-06-09. As of June 2009, aerial photos of the airport show that its runway is closed with X's painted on the asphalt. Additionally, the runway is now being used as a driveway for a large house built at its southern end. As such it is not advised for aviation use except in an emergency.