There is only one trailhead, so you're looking at an in and out trek. Being 6.8 miles long it's an average length backpacking and hiking trail. Tucannon River Trail stays roughly within the same elevation zone the whole time which means the conditions are about the same from start to finish. This hike shouldn't take more than 6 hours, but of course some folks walk a bit slower and some a bit faster. This area does get very dry sometimes, so make sure you check current conditions and fire restrictions with local forest authorities before you head out. Keep in mind that this is a long backpacking trail, so do pack enough food to last the whole trip. The total elevation difference for Tucannon River Trail is 702 feet which is lower than average.