As the days get shorter and less sun-blessed, deciduous trees gradually stop producing chlorophyll. This allows other pigments, including carotenoids (yellows and oranges) and anthocyanins (reds and purples), the short-lived chance to shine -- or, rather, glow.
At the same time, droves of travelers gear up for the chance to soak in the season's dramatic spectral array. If you are among those seeking a kaleidoscopic foliage experience, here are several vibrant vantage points from which you can see nature awash in all its glory.
Pohono Bridge, Yosemite National Park, California
Where: At the far west entrance to Yosemite Valley, this arched bridge crosses the Merced River. Arrive by way of California 140 or 120.
Stars of the show: The plentiful dogwood trees flaunt pinks and crimsons, while maples and black oaks become a brilliant yellow.
Color peak: Oct. 12 to 19
More info: (209) 372-0200, www.nps.gov/yose or www.yosemitepark.com.
Independence Pass Road (Colorado 82), southeast of Aspen, Colo.
Where: A 44-mile, high-altitude scenic route in White River National Forest (Aspen Ranger District).
Stars of the show: Aspen trees' quivering leaves, translucent when lighted by the sun, turn a shimmering gold. Cottonwoods get an orange-tinged yellow, and scrub oaks gleam red. In a state with "color" in its name, it doesn't get much better than this.
Color peak: now to Friday
More info: (970) 925-3445, www.fs.fed.us/r2/whiteriver or www.aspenchamber.org.
Great Smoky Mountains National Park, south of Gatlinburg, Tenn.
Where: In the mid-elevation levels (2,000 to 4,000 feet) of the Great Smoky Mountains National Park.
Stars of the show: About 100 diverse plant species, including sugar maple, scarlet oak, sweet gum, hobblebush and the hickories extend from pink to purple.
Color peak: Oct. 18 to 31
More info: (800) 588-1817, www.gatlinburg.com/fall-foliage.asp or www.nps.gov/grsm.
Atop Camelback Mountain, Big Pocono State Park, northeast Pennsylvania
Where: From the summit, you'll see color in eastern Pennsylvania, the gorgeous Delaware Water Gap and parts of New Jersey and New York.
Stars of the show: The view encompasses maple, birch, poplar, sycamore, oak, hickory and dogwood trees -- a stunning canvas painted with bright reds, oranges and yellows.
Color peak: Oct. 12 to 17
More info: The Poconos' 24-hour Fall Foliage Hotline: (570) 421-5565; www.dcnr.state.pa.us, www.800poconos.com or www.fallinpa.com.
Mt. Greylock, northwestern Massachusetts
Where: On the Appalachian Trail in the Berkshires, east of U.S. 7.
Stars of the show: On the lower slopes, maples and red oaks are a deep scarlet; at higher elevations (the summit, at 3,491 feet, is Massachusetts' highest point), yellow birches and mountain ash steal the spotlight. Hiking trails take you up through the majestic spectrum.
Color peak: Monday to Oct. 8
More info: (617) 626-1250, www.mass.gov/dcr/parks/.