Dagney made some very good points.

Although we don't live in Oregon, we live on the northen end of the Cascadia Subduction Zone. This area shares the same type terrain, weather, infrastructure etc as other cities such as Seattle. If and when there is a 7+ earthquake here, I am under no illusion that an evacuation on foot to the east on foot to the interior would be very ill advised.

In this area, in order to travel east, there are only 2 major highways to follow that have bridges that are also vulnerable to an earthquake. If you happen to live on the eastern side of the bridges and were foolish enough to think of evacuating by vehicle, the local roads that were not affected by the quake would be gridlock and impassable.

Traveling east by foot or bicyle would even be more foolish. After a 60 - 90 mile walk through relativley easy valley terrain and assuming you had the proper gear, food water etc to make it this far after days of walking, the Cascade mountain range is now a major obstacle. At this juncture, there are 2 roads heading NE into the interior and assuming that critical bridges and tunnels have not collapsed...which many probably will of, the evac is now inherently dangerous. Here in the coast range mountains, there is often snow and severe weather well into May at higher elevations. In the summer, the daytime temperatures can reach the triple digits. Those who make this far now would have days of walking with no infrasture, no food and only a couple of very small towns and villages that would be quickly overrun with people who where driving when the earthquake hit. Although these small towns may of survived the earthquake which was 200 to 300 miles southwest, these towns would be in short supply of food etc as it has to be trucked in during normal times.

Taking Dagney's points into consideration and the above, if the big quake hits here, the odds of survival after the quake would be much more in our favor by staying put then attempting to evac on foot to a destination that is hundreds of miles away...and fraught with almost overwhelming difficulties in many forms.