Hi Cecil,
The thought crossed my mind (maybe .01millisecond). 15 miles from SW Beaverton on Hillsdale to Terwillger and over the river and back would be ok during a sunny day. At night in the rain, well, I would have to have green Vulcan blood for that. :-)
BTW, what route would you recommend from Murrayhill area to downtown PDX?. I've charted routes via bycycle.org and Google and would like to find the safest and quickest.