With an elevation of 4167 ft. Mt. Si dominates the skyline of the Upper Valley. This local landmark is a popular destination for hikers of all skill levels and its very popular hiking trail has a 3300 ft. vertical gain in four miles (from 500 ft. to 3800 ft.). Atop Mt. Si, hikers enjoy expansive views of The Valley and on clear days the distant views of Mt. Rainier, the Seattle skyline and the Olympic Mountains complete the landscape. Mt. Si has become Washington's second-most popular hiking trail. Walk, stroll, hike or bike to Washington Trails Association and Valley Trails.