Oregon is a state with great natural beauty so there are always going to be good places to go to smoke weed. If you are looking for some cool parks to do this then you could check out Stewart Park, Templin Beach Park, or Micelli Park. These are all really cool places where you can go to smoke a joint and hang out in the great natural beauty of your surroundings. There are many things to do it all of these parks and you will have a lot of fun.
What is better than being with a few friends on a beautiful afternoon, at a picnic in nature with a couple of joints? I know.. having three joints :)) Finding yourself in Roseburg, a great place to exercise this previous scenario is the Stewart Park. It is a fairly large place so you can get a picnic spot with all the privacy you need. As soon as you get bored of those picnic sandwiches, there is a place named Burrito Vaquero that both locals and tourists enjoy where you can serve some good mexican good. If you decide to spend the night, nearby there are multiple motels so take a pick!