Hello, your best bet on locating native plants may be to contact the closest chapter of the OR Native Plant Society.  For roses, raspberries and blackberries, thornless varieties are the result of breeding- native types almost always have thorns. The thimbleberry, a close relative of blackberries that is native to Oregon, does not have thorns, but its fruit is usually not considered tasty.

Here are the two native caneberries you might be able to find: Rubus ursinus, the Pacific blackberry, is usually very thorny. It has many common names.

The black cap raspberry, Rubus leucodermis, also has many thorns. 

This site is especially helpful in distinguishing the different cane berries found in Oregon. There are many that are naturalized, so found in the wild, but not native to Oregon. 
https://landscapeplants.oregonstate.edu/plants/rubus-ursinus

I hope you find this helpful, Nicole