Drive 30 miles East on highway 26 from Sandy to the turn off for Trillium Lake then look for the boat ramp sign.
Nikon D610 Nikkor 24-70 f/2.8 set at 55mm, f/11, 0.4 seconds
I visit this location several times a year. I got lucky on this day, calm water, and some high clouds. After sunset the clouds had a cotton candy look for a few minutes.