Wikipedia: Autumn Leaf Color
User-created article about fall foliage, including notes on what causes the leaves to change color.
Explains in detail what occurs in the leaves as they change color in Fall.
Why Leaves Change Color
U.S. Forest Service fact sheet answering question about fall foliage: Where Do Leaves Get Their Autumn Colors? Do Different Kinds of Trees Turn Different Colors? Why Are Some Autumns More Colorful?
The New Science of Fall Colors - Discovery Earth
The secrets of why leaves of trees change yellow or red in the autumn are slowly being revealed. Discovery slide show of the eye-seducing hues, and the science behind them.
Henry David Thoreau: Autumnal Tints
October, 1862 essay in which Henry David Thoreau reflects on the brilliant fall colors of New England.
AccuWeather.com: Fall Foliage
Find news about where the fall foliage is peaking in the United States. Also provides background information about what causes fall colors.
Flickr: Fall Foliage Photos
Browse user-posted photos that are tagged with "fall foliage."
Google News: Fall Foliage
Browse news articles about fall foliage, including reports on where colors are peaking, as well as notes on the best fall color destinations.
Weather Channel: Fall Foliage
Plan your leaf-peeping with the Weather Channel's U.S. fall foliage reports and regional fall color maps.