The following is from the Portland Marathon website;
Every year the Marathon runners consistently say how wonderful the spectators are throughout the course and are so encouraged along the way because of your enthusiastic support. We would like to help you find the best spot to cheer on runners with the following suggestions
DOWNTOWN, due to its proximity to the start and finish areas, is a great area to observe:
4th from Salmon north to NW Glisan (mile 1)
East on NW Glisan to SW Naito Parkway (Front Ave.).
South on SW Naito Parkway to SW Harrison (mile 1 to approx. mile 3).
West on SW Harrison to Barbur Blvd.
All SW Naito Parkway (mile 4 to 11). Runners pass twice on Naito Parkway between NW 17th Ave. and turnaround past mile 9.
From NW 17th Ave. and west on Raleigh to mile 12.
Toward the finish area on 3rd and Madison from NW Flanders and Front Ave. (mile 25 to 26).
Between mile 19 and 20 on Willamette Blvd. 1-5 North, take the Lombard West exit, follow until Olin Ave. or Portsmouth Ave. Take a left on either of the two until Willamette Blvd.
Between mile 21 and 22 on Willamette Blvd. 1-5 North, take the Lombard West exit. Left on Greeley Ave., and right on N. Portland Blvd.
We do not recommend spectators to watch between:
Miles 12 and 18 due to the heavy traffic of St. Helens Rd!
Mile 23 and 25 due to blocked streets or heavy traffic on Interstate Ave. and the Steel Bridge!
QUOTE(lawgeek @ Sep 5 2006, 05:29 PM)

This running thing has been a pretty big deal for me and part of what has helped me stay focused on my goal of starting and finishing the marathon in one piece are the great friends I have. I'd like to invite them to join me as I accomplish my goal on the 1st, and I've heard the course is very observer friendly and that folks can even join in and run a couple blocks without causing too much of a fuss.
I know from mile 17 across the St. John's is off limits to unofficial runners, but how about once we're heading back to town? A number of friends want to help me through The Wall and are placing dibs on who gets to run with me where. I want to make sure the mile posts they're picking are OK and won't interfere with the other three people finishing with me at the end of the day.
Can anyone who's run the marathon before chime in and let me know if there are completely off limits areas where I should encourage people to cheer and not run?
thanks,
k