With trees ablaze in a dizzying array of stunning colors, from bright reds to sparkling golds, there's no better time to strap on your hiking boots than autumn. Thanks to the country's expansive and dynamic geography, nearly every corner in America's national parks come with spectacular views. Plus, the crisp, cooler air in so many parts of the country make it easier to hike longer without fatigue. So toss on that cozy sweater, grab your thermos of hot cider and head to these breathtaking spots. Ranging from easy to strenuous, these hiking destinations offer epic views and trails suitable for a variety of interests and skill levels.\r\n\r\nThe Appalachian Trail through the Great Smoky Mountains National Park, Tennessee One of the most popular parks in the country, the Appalachian Trail is nothing short of spectacular in the fall. This segment of the AT, which extends 94 miles through Tennessee, winds through the lush Great Smoky Mountains and offers glimpses of foliage and cascading waterfalls as well as valley viewpoints. If you don't have weeks to spend on the trail, hike the smaller section from the Iron Mountain Gap to the Cross Mountain, which is a mere 17 miles and allows you to set up camp in the decorated Cherokee National Forest. Old Rag Mountain in Shenandoah National Park, VirginiaArguably the toughest hike in Shenandoah National Park, Old Rag Trail is not for novice hikers. However, don't let that deter you from climbing the rugged, steep and winding nearly 9-mile-long circuit. You'll be welcomed with panoramic, 360-degree views of the picturesque Shenandoah National Park's 200,000 protected acres, which comes alive in a natural palette of bright orange, gold, yellow and red in autumn. Tackle this strenuous day hike during the week to avoid the massive crowds that visit during leaf-peeping season.\r\n\r\nCentral Park, New York CityYou don't have to go far to experience an invigorating hike. In fact, you can do it right in the center of one of the country's s largest cities. The Ravine, a stream bed located in the lush green and yellow trees of the North Woods in Central Park, is great for leisurely hikers and kids. The trail extends from 101st Street to Harlem Meer (ending near the gorgeous Huddleston Arch) and is home to an incredible variety of wildlife, like migratory birds and raccoons. Home to 57 other hiking trails, there's plenty of places to see the colorful trees and monumental skyline inside the 1.3-square-mile natural oasis.\r\n\r\nAcadia National Park, MaineThe incredibly scenic and robust coastal mountains of Acadia National Park provide some of the most expansive and stunning views of New England's coastline. Since many of the roads are unpaved and closed to cars, the park makes an idyllic place to hike along colorful birch, maple and poplar trees. For a memorable sunrise, hike up the Cadillac Mountain along the North Ridge Trail, which reaches a staggering height at 1,530 feet. Though it's not for the faint of heart, ascending the popular (and strenuous) Beehive Trail will yield amazing views of Acadia's bright foliage against the icy Atlantic.\r\n\r\nBear Lake, Rocky Mountain National ParkOne of Colorado's crown jewels, Bear Lake is one of the most beautiful hikes in Rocky Mountain National Park. The lake's aqua blue color framed by the glowing yellow and orange aspen trees create dazzling views. The trail around the lake is an easy walk and encompasses 0.8 miles along the stunning lakeshore. And once you reach the summit, you'll be welcomed with more panoramic views of the picturesque lake, colorful forest and the towering Half Mountain and Longs Peak.\r\n\r\nWildwood Trail, OregonCovering over 30 miles in Portland's Forest Park, the Wildwood Trail is a local and tourist favorite. The trail is flanked by spectacular Douglas firs, creating a thick canopy along the scenic route. For an eerie, yet hauntingly beautiful landscape, turn northwest onto the trail at mile marker no. 12. Through the lush trees, you'll find an arduous climb up Newton Road. The tranquil views at the end are postcard-worthy, with a stream-filled ravine decorated with brightly colored leaves in red, orange, light yellow and green hues. Beaver Lake Loop in Pictured Rocks National Lakeshore, MichiganOne of the Michigan's most stunning trails, the Beaver Loop inside the 73,000-acre-long Pictured Rocks National Lakeshore winds along the multi-hued sandstone cliffs and verdant forests. Starting at the campground, the 3.5-mile trek circles around Beaver Lake along the beautiful Beaver Creek. A shorter, 1.5-mile hike, which also starts at the campground, takes you through the vibrant foliage to Lake Superior's craggy coast. The icy blue water against the blazing trees provides one of the most dramatic views in the park.