Alaska tends to be good for third party candidates. Nader actually finished above 1% there in both 2004 and 2008 too. Maybe something to do with the controversy over drilling for oil there?
Edit: It did have to do with oil. Nader had a "strong stand against the recent merger of BP Amoco and Atlantic Richfield Co., which would have consolidated control of the state's oil reserves". Evidently, Nader and Buchanan each thought they could finish 2nd in Alaska. A poll, per this article, showed Nader at 17% at one point!
https://www.washingtonpost.com/wp-srv/aponline/20001023/aponline173219_000.htm
