Make Your Mark in Eugene sometimes has smaller events.
The Oregon Horse Center has just started up a new series, they had some derby-cross/one day type events last summer and they are doing an indoor eventing series (no dressage) through winter-spring, down to intro-type levels.
Lake Oswego Hunt Club usually has a one day or DX type event in the late summer-early fall (trot-a-trail to T)
DevonWood has also been holding DX and combined test shows in the spring/summer, from poles/crossrails on up.
Aspen Farms usually has some spring derbies.
Lincoln Creek Pony Club usually does two back to back 1-days in August (or maybe July?).
I’m sure there’s more, that’s just off the top of my head. :lol: It’s a bit early in the year yet.