Here is a link of the google map with the cycling directions: (http://tinyurl.com/cny8v6m)
If it isn't apparent my goal is to ride from Portland to SeaTac, meet some friends outside the airport and ride with them to the Gorge Amphitheatre in May for Sasquatch Music Festival (http://www.sasquatchfestival.com/). While doing some cursory research I've come across many stories about the ride being very difficult because of road restrictions. Any ideas or input on this ride would be helpful, I'm not from the area. Thanks!
Mostly I'm wondering if the ride is possible and if so, what are the areas I will need to avoid.