OR is pretty - lots of mountains, big trees, beaut coast, great camping (free), and, of course, Sasquatch. They also like their brew pubs up there (I’m in San Francisco). The Columbia River Gorge is beautiful - waterfalls, fish ladders. Also, McMenamins Brothers pubs are dotted around the place (eg, Barley Mill Pub) and are well worth a checking out. Then check out Mt Hood and work south. Bend is cool, too (great brew pubs), as you make your way to Crater Lake (do a lap around it). From there you could work south to Oregon Caves, then west to the coast, and ride back up along 101 to Astoria.
But you’re not far from Canada. And the Canadian Rockies are awesome. It’s two days up to Whistler, another two days across to Banff, and then come back down through the Canadian Glacier National Park via Calgary. You can choose how you get back to Portland from there, but no matter which way you go it’ll be great riding and beautiful. Keep in mind, though, that in June/July it can get hot up there, and it can get smoky from wildfires - that’s already happening now a bit further east of where I just mentioned.
https://fire.airnow.gov/
It may or may not do either when you’re there, but something to keep in mind. In the case of either heat or smoke, the coast is generally your friend.
If you can be flexible and you like some of the above options you might plan an alternative route just in case.