Willamette Jet boat Excursions is an exciting journey that takes you up and down the Willamette River for a two-hour, 37-mile boat ride. You will not have the usual slow rolling tour, this boat is fast and you do end up covering quite a bit of the river. Comfortable seats and a smooth ride make it fun. Some sights are incredible, like the plunging falls where the upper Willamette meets the lower part of the river.