The activities initially were local walks with the first trip being a hike through Fort Lawton to the West Point Lighthouse (now part of Discovery Park). The first mountain climbing trip was Mount Si. In 1907, 65 members made a group climb of Mount Olympus and exploration of the Olympic Mountains. The next year a summit of Mount Baker was organized, followed by Mount Rainier in 1909. In 1915, a club outing became the first sizable group to hike around Mount Rainier and established the route that would later become known as the Wonderland Trail. The club organizes thousands of trips per year, has a large library and historical archive, teaches instructional courses, and advocates access and environmental causes.