3.1 Tributaries 3.2 Water quality 4 History 5 Vegetation and wildlife 6 Parks 7 See also 8 References 9 Works cited 10 External links [ edit ] Course Tryon Creek begins slightly north of  Interstate 5  (I-5) and  Oregon Route 99W  near  Multnomah Village  and flows southeast for 4.85 miles (7.81 km) [7]  through Portland residential neighborhoods as well as Marshall Park