Maybe something here.

Here is a link that might be useful: Trees That Merit Planting in Seattle

I've saved this list previously -- there are many great ideas on it. The Chitalpa sounds wonderful and I will check that one out. Thanks for the response.

There's also that plant selection guide section near the front of the Sunset Western Garden Book. Or you could walk around one of the collections near you there (Butchart? UBC? VanDusen? Don't remember where Duncan is) and see what looks good.

One of the first trees that came to mind, was red maple, which I enjoy.

Then I saw your mention of "pasture".

Here is a page of plants that are not good in a pasture, if its for horses...

Toxic Plants and Horses

If there will be no horses, they your options are more numerous.

I'm a fan of Beech trees, especially the Tricolor and purple leaf kind.

Red maple is an obvious candidate but those are planted so frequently that it's hard to get jazzed about another one being planted - or encouraging the planting of yet another one. The common 'tricolor' beech is a purple-leafed kind also, the true tricolor beech (with white, green and pink leaves) being extinct or nearly so.

Why not consider paper bark birch or quaking aspens?

Native trees require less care and are less prone to disease.

I'm not sure if native trees are less prone to disease.

Maybe some natives.

But there are a few that come to mind, which are almost synonymous with disease.

Yes, when you plant something in its native area it's also the native area for its natural pests and diseases. Some native plants are comparatively easy because they are adapted to local climates and soils, these will be the ones common in nurseries. Many other native plants do not lend themselves to garden use much. Likewise some exotic (non-native) plants are quite easy to grow - sometimes too easy - and others are not. Retail outlets with full product lines offer plants for different levels of interest and ability.

We do have donkeys in the pasture so appreciate the info about horse poisons. However, these guys are fenced out of this area most of the time because they eat the fence (barn, tree bark, etc., etc.) They are quite naughty. Aren't horses (and donkeys) smart enough to know what is poisonous? We have a black walnut tree that has self seeded and they must have left it alone because it is now over 20 feet high! DH is still plumping for a flowering tree.

Thanks all for your suggestions. Yesterday, we purchased a Chitalpa "New Dawn" and an Empress Tree - Pawlonia which I will let grow as a tree. Went a little crazy and also picked up a Prune Plum and a cherry tree for the orchard and a weeping willow to replace one the deer killed years ago. It goes into a wild corner of the property where there is a creek. It's well away from the house but should look quite pretty there. I have a roll of stucco wire which will be used to make protection for the young trees. It seems to work well. I do appreciate your recommendations.