The middle of the month is the premium time to go because the water is at it's highest FYI. So don't snooze on this if you really want to go and book your trip today before they are all sold out!
It's a late-summer tradition around the Yakima Valley: the annual Tieton River "flip-flop."
Every September, the Bureau of Reclamation opens Tieton Dam to release water that's been stored in Rimrock Lake all summer -- so it's nice and warm...