Try going directly to the map.
http://www.echelongranfondo.org/portland/images/COLUMBIA-RIVER-GORGE-MAP.pdf
That is an awesome century ride. I have done it several times from Hood River. First you ride the Old Scenic hwy to The Dalles, then wheat country rollers to Dufur, lunch at the Past Time Saloon, CLIMB 3000' to Knebal Pass on a full belly, followed by the 4500' descent into Hood River.
Bring your camera!
We should do it as a club ride in the spring. Knebal Pass usually opens mid-May; perhaps April this year.
PS. I just noticed on the map that there is a Time Trial climbing the 3000' in 20 miles from Dufur to Knebal pass. OUCH.