Visited Okutama and Takaosan in early Nov for fall foliage.
day trip from Tokyo, about 2hrs by express train from Shinjuku. The lake area can be accessible by public bus.
easy day trip from Tokyo, just 50min by express train from Shinjuku, followed by a cable car ride and a short hike. As it was on a weekend with some Koyo, it was very crowded.