- The Skyline Trail is the main route for hiking out of Paradise, Mount Rainier’s south side hub and most popular destination, providing visitors a unique opportunity to experience the breathtaking beauty of Washington’s grandest mountain. Even before the historic Paradise Inn was constructed in 1916, the Paradise valley has long been one of the state’s most beloved hiking destinations because of its southern exposure, giving it a longer season than its north side counterpart, Sunrise. In peak season (July and August) your trip along the Skyline Trail will be filled with views of cascading waterfalls, mighty glaciers and subalpine meadows brimming with colorful splashes of lupines, mountain heather, scarlet paintbrush, cascade asters and bistort.