Pacific Northwest Picnic was adapted by Tom Halpenny from the medley Pacific Northwest Picnic Surprise, a collaborative creation by members of Portland, Oregon and Southwest Washington State branches performed for the RSCDS Virtual Festival 2018.
https://www.youtube.com/watch?v=OI81iNlysBs&t=95s
There is also a 3 couple version of this dance (
http://www.rscds-swws.org/news/stories/PacificNorthwestCeilidh.pdf
).