Before planting peaches, choose a site with well-drained, moderately fertile soil in full sun. Be sure to avoid low areas because frost can easily settle there and destroy your peaches.

Plant the trees in spring. It is best to plant the trees the day you get them (if possible). Pick a tree that is about 1 year old.

For container-grown trees, remove the plant from its pot and remove any circling roots by laying the root ball on its side and using shears to cut through the roots.

For grafted trees, position the inside of the curve of the graft union away from the sun when planting.

Dig a hole that is a few inches deeper and wider than the spread of the roots. Set the tree on top of a small mound of soil in the middle of the hole. Be sure to spread the roots away from the trunk without excessively bending them.

If you are planting standard-size trees, space them 15 to 20 feet apart. Space dwarf trees 10 to 12 feet apart. However, most types of peach trees are self-fertile, so planting one tree at a time is fine.

Here are some varieties that will do well in our area and ripening dates:
Red Haven I, II Aug. 5–10 Most popular, clingstone until fully ripe.
July Elberta I, II Aug. 15–20 Old favorite.
Veteran I, II Aug. 20–25 Regular bearer.
Early Elberta I, II Aug. 24–28 Old favorite.
Rochester I Aug. 24–30 Old favorite.
Frost I, II August Resists leaf curl.
An excellent variety for the Northwest, Oregon Curl Free is resistant to Peach Leaf Curl and produces good crops of large, tasty, sweet and juicy, orange-yellow Peaches. These delicious, semi-freestone peaches ripen in mid-August and are excellent for fresh eating, baking, and preserves.

Here are some publications you may find useful.

https://extension.oregonstate.edu/catalog/ec-1181-selecting-peach-nectarine-varieties-willamette-valley

http://tallcloverfarm.com/17477/growing-peach-trees-pacific-northwest

Hope this helps!