The Association of Washington Aerial Applicators (AWAA) is holding a fly-in/pancake breakfast on Saturday, October 4
th at the Ephrata airport (
https://portofephrata.gov/event-information/).
According to the flyer and the Port, runways 3/21 and 4/22 will be closed (11/29 will remain open) during the aerial events (including some aerobatics in the box). The FAA will not allow the airport to publish a NOTAM until 72 hours before the event, and
"some details still need to be ironed out", but expect to see a NOTAM closing the runways at least part of that day.