Pacific Crest Trail (PCT), USA - One of the most demanding treks. More people have made it up Mt. Everest than have hiked the PCT! This is because the route traverses 7 National Parks and an array of eco-zones throughout its 2,663-mile trail. Deserts, mountains, forests, fault lines are all traversed in California, Oregon, Washington, before finishing up in British Columbia, Canada. The best time to trek the PCT is between April – September, and the full route takes approximately 140 days!