Pros:
- Nice variety of holes.
- A few birdie opportunities, but no easy gimmes.
- Well-defined fairways on every hole.
- Very little underbrush; almost impossible to lose a disc here.
- Well-drained land; never sloppy/muddy, even in winter.
- Most holes have alternate pin placements.
- Excellent concrete teepads.
Other Thoughts:
The part of Portland General Electric's Timber Park set aside for disc golf is used ONLY for disc golf, and has been for years. So it has the feel of a "mature" course with straightforward fairways and very little brush to get lost in. Most of the course is under trees, but with enough open area that you don't feel like it's a crapshoot. No one hole stands out in my mind as much better or worse than the others; they're all different, all fun, and they flow together well. The only real negative I can come up with is that there isn't a lot of up and down; most holes are flat.
Timber is right across the Clackamas River from Milo McIver State Park, and lot of people think of Timber as an inferior alternative to McIver. I disagree; I think McIver has too many long, wide-open shots, whereas Timber mixes it up better. Besides, every time I finish at McIver I feel like the course has beaten me up, but I've never felt that way about Timber. It's not only that it's easier or shorter -- it's just more fun somehow.
Update, November 2009: they've finally re-opened the road down into the "bowl," updated the map on the kiosk, and changed the numbers on the baskets and teepads to reflect the new 19-hole layout.