Oregon gold prospecting can be done on lots of streams and rivers. It is best to go where you know gold has been found before. That doesn't mean you couldn't find gold in a new place - a new lucky strike, but you could spend an awful lot of time looking. There are places set aside by the United States Forest Service and by the Bureau of Land Management where you can pan. It is best to go to the USFS station in the area where you plan to prospect and get specific up-to-date information from them. I am including a list of these stations which are in gold mining areas. The places where you can prospect can change. You don't want to get into trouble for prospecting on a someone's mining claim.