4. Blue Hole
Located in the Little Si Natural Area just east of North Bend, this Snoqualmie River spot is one of the most energizing swimming holes in Western Washington. Brisk currents bring cool river water into this connected series of pools, and it's a blast to ride the rapids from one to the next. Not a good place for inexperienced swimmers, though.
End of SE 114th St, North Bend. Google Map