To be honest, I'm not sure about kayaking in the Troutdale or Portland area. There are State parks along Interstate 84 - along the Washington State side; you may be able to kayak there. You will need a Discover Pass for them. Woodland, Washington is off I-5. You can float or kayak the Lewis River.
You can kayak the Willamette right out of downtown Portland, near by in Troutdale you can kayak the Sandy River, a few miles north you can kayak the Ridgefield area (there is an animal preserve for good bird spotting), and you can kayak the Columbia pretty much from anywhere in the… More
