The details about the daylong sunrise-to-sunset cache machine are in this forum discussion, but the official event is the after-machine dinner.
Dinner will be at 7:30 PM on Saturday, June 24, 2017 at Pietro’s Pizza, 13281 SW Canyon Rd, Beaverton . The coordinates are listed above. I expect we'll end around 9:30 PM. Please log a "will attend" as soon as you know you'll be there. I'd like to give the restaurant an idea of how many of us will be there before we all show up. Be sure to put this on your watch list now, so you'll be among the first to know about changes and updates as the big day approaches!
And yes, I'm aware that this is the same day as the Tri-Cities 2017 Geocoin Challenge mega event. If that's more your thing, go for it! I won't hold it against you 