Hi Daniel, if you check out the road opening and closure page in the need to know section you see when everything is ridable. Most mountain gravel roads are not availble in June. Mjølkevegen opens 20th June. Most paved mountain roads are open. My suggestion would be the Fjord Norway route but skip sections of Rallarvegen by using the train. Gamle strynefjellsvegen doesn’t open until 15th June but rest you should be good.