Contact: Jennifer Lutman, 406-888-7895. WEST GLACIER, MONT. - Hikers and bikers can enjoy unrestricted access on the Going-to-the-Sun Road this holiday weekend at Glacier National Park. The Apgar Visitor Center is open and the St. Mary Visitor Center is scheduled to open Saturday, May 25. Many park concessioners and privately-owned facilities will begin to offer visitor amenities this weekend.