So far I'm not too impressed by Oregon courses. Not many really bad, just most kinda rough/hard to navigate/less than 18 holes/not challenging. I also haven't played the top rated ones yet however, Milo, Whistler's Bend, etc.
Salem, OR- Cascades Gateway:Fairly open in large fields, with some patches of trees, and a few holes along edges of woods. Thick nasty blackberry bushes could ruin your day on a bad shot on a few holes. 2 holes play close enough to a lake to get wet. Flat and dusty. New cement pads were just poured 2 days ago, some still covered with plastic. The old tees are horrible, loose gravel or dirt with smooth rocks and slippery grass. Nothing really tough except for a hole that throws 200' to a small gap in thick woods then through it, straight. Can be windy. Well marked, signs, map, baskets numbered.
Salem, OR- Corban College:Very unique, one hole features cement as the entire fairway. It's 425', with woods on steep hill to right, and a building on the left. Your drive will land on cement, hit a building, or a tree, unless you can park it. The next hole is mostly cement too, downhill along a road and shaped like a 'U'. One tee is off an old cement structure. Very bad tees when not on asphalt like 1,3,8. Well marked, baskets tell you where to go, signs. The first tee requires you to duck. Gets really close to campus, imagine it'd be hard to play during fall.
Scotts Mills, OR- Camp Dakota:Not worth playing. No one was there to explain it (private, fee) or take my money. I parked and ran it. Tubetones, not baskets. Thick very rough fairways, shoots up and down hills on trails, often blind doglegs. Easy to lose a disc. No poison oak and hardly any thorns spotted, but still thick rough, goodbye discs.
Estacada, OR- Timber:One of the best in Oregon so far. Through tall pines and fields, mix of half open and tightly wooded. One hole plays over a small building. #17 is 600' with a power structure in the fairway, and OB on both sides. Several OB fences, no water. Good variety, requires some power to score well. Not well marked, most tees not numbered, no signs. Would be hard to figure out, but I played with 2 locals. Map online.