Northeastern U.S. (New England), southeastern Canada, Adirondack, Appalachian, Smokey, and Rocky mountain regions, select areas around Seattle, Portland, and San Francisco, also northern Arizona and New Mexico and sections of Colorado.
Remember that cooler higher elevations will display color before lower warmer geographic regions.
Even with these facts the timing, location, and intensity of autumn color are not completely predictable. To truly experience the colorful display you must be adventurous. There are many states with thousands of scenic byways designed to focus on the palettes of autumn color. So even if you live in a region that does not produce an array of color, take an autumn vacation and explore nearby states that do. For up to date regional information you may contact the U.S. Forest Service Fall Color Hotline at 1-800-354-4595 or on the internet at