I hit the lake later in the afternoon as everything was cooling down (about 70 degrees of air temp on a day that topped 90). It was a while since I last fished Boren, so I went on the North end to cast off of a public dock. The area over there was full of lily-pads by the inlet stream and, from my experience, full of bass. I had a rapala (trout pattern, though it is good all round) and dug through the bushes to get to the dock.
Unbeknownst to me, the dock was removed a year or so ago to protect the mouth of the stream as a "critical wetland area". I was disappointed, but nonetheless went to the park to cast off of the dock. I began to pull in the rapala closer to shore in the middle of the dock and almost immediately got a nibble. I got a couple more nibbles over the next five minutes until I pulled out a nice plump perch. I took the hook out and released it back into the lake.
In the next half an hour, I had pulled out 3 fat crappies, a stocker trout, and a handful of perch.
I released all but one of the crappies. It was bony but really good with a side of potatoes. Boren is a good spot to fish, you just need to know where to cast your line.