I’m sorry for the lack of clarity of this photo. The original print is quite small, and has a light streak down the middle of it. In addition, the paper the photo was printed on seems to have a microscopic honeycomb pattern in it that was picked up in the scan of the photo. I was only partially successful in digitally removing that. In spite of the quality issues, the photo is clear enough to identify people and see what is going on.

The notation on the back of this photo indicates that it was taken “near Albany, Oregon, 1935”. This could be Bryant Park. I know there are other photos of swimming from this period that clearly were taken there. But it is impossible to know with certainty in this case.
Because the original print is so small and so fuzzy, some of the identifications written on the back seem to be incorrect. I’ll give you my best guess as to identities, partially informed by the notes on the back of the photo.
There can be no question about the guy in front, down in the stream, partially hidden by its bank. That is Dad (Lloyd). Behind him, from left, are Earl, holding baby Donna, John, Ed, Lee and Harold.
Ed is evidently standing on one leg to demonstrate something as he tells a story, to the amusement of John and Lee. Lee appears to be about to imitate the way Ed is standing.
John appears quite emaciated here compared to the others. He passed away in July 1935 (age 20), so if this photo really was taken in 1935, his death is imminent. (And if that is Donna that Earl is holding, the year has to be 1935, since she was born in October 1934.)
Gotta love the swimming attire of that time, though.