"WHEN DAYS SHORTEN and nights grow cooler in late summer and fall, trees such as maple, oak and beech cloak themselves in the bright shades of autumn. No colors are more central to this palette than the yellows, oranges and reds of sugar maples, which range from eastern Canada through the mid-Atlantic states, west to Minnesota and south along the Appalachians into Tennessee. Also prized for timber and maple syrup, sugar maples highlight the foliage displays that draw millions of people outdoors for nature’s autumn fling.