Lovely woman who I've known for years. Her barn is in the greater Eugene area - she teaches dressage and also has some H/J folks. Definitely worth talking with her! If her program doesn't fit your needs, she'll be able to make some great suggestions. She grew up in the Eugene area and is well-connected in the dressage community.
Second the recommendation for Katie -- she is my current trainer and she is awesome. Are you looking for somewhere to board? Katie works out of Triple Crown Farm in Pleasant Hill, which is where I am currently boarding.
It is a pretty big barn (60+ stalls). If you are looking for something smaller I can also recommend my former trainer, Sarah Kress (Eskay Equestrians). She is great and takes terrific care of the horses. I only moved my horse because he was lame for a long time and Sarah's place is a training barn, and because Triple Crown is much closer to my house.