Today I tried the Bike Gear Database's "Gravel Guide Portland: Lake Oswego." Nevermind I don't know who or what they are, it sounded official. And I was right with them, enjoying the route, until it came to Cooks Butte. Halfway up, I was stopped by rocky, rooty, steep single track that I wouldn't have been able to handle even on my full-suspension mtb. Lots of hike-a-bike ensured. After Cooks, the route later wanted to go on a trail underneath HWY 43. Rocky, rooty and even more impossible. By that time, I could see looking ahead that the route was going to include a fair amount of riding on 43 and as much as I wanted to try the railroad tunnel, I abandoned the route and rode home. Fun adventure, but I'm going to do some route revision before trying this again.