4T Trail Professional Review and Guide
"A number of assets place Portland near the top of the list of America’s most-livable cities. Among them, public transportation, green spaces, and a walkable downtown area all contribute mightily. If you are in town for one day and want to soak up as much as you can of the good stuff this place has to offer, the 4T Trail should be somewhere near the top of your list.
The T’s of the 4T Trail stand for Trail, Tram, Trolley (Portland streetcar), and Train (MAX). When combined, these T’s create an approximately 9-mile loop and a quintessential Portland experience. The 4T highlights urban parks and trails, stunning views of volcanoes and cityscapes, a tram ride, and our legendary public transportation."