Hello,
Do you have an established peach tree(s), or are you looking to plant? Unfortunately peaches can be challenging to grow in the Willamette Valley due to our wet springs. Diseases are really problematic on peaches when they are grown here, especially peach leaf curl, so you will need to manage these. Below are some publications that will help with peaches and other fruit trees:

 https://extension.oregonstate.edu/catalog/pub/ec-631-managing-diseases-insects-home-orchards

https://extension.oregonstate.edu/catalog/pub/pnw400

Please let us know if you have additional questions and thank you for using Ask Extension.