Along the White Pine Scenic Byway, the Trail of the Coeur d’Alenes follows much of the original Union Pacific railroad grade built after silver was discovered in the valley in 1884 and rail construction began between Plummer and Harrison in 1888 to support mining and timber. In St. Maries, Mullan Park honors Lt. John Mullan, who surveyed and built a wagon trail around 1859 between Walla Walla, Washington and Fort Benton, Montana, and the park also preserves native conifers and logging equipment. Cataldo Mission, the Old Mission of the Scared Heart, is Idaho’s oldest standing building, completed in 1853 under the direction of Father Antonio Ravalli, S.J., and later used as headquarters by Fr. Joseph M. Cataldo in 1877. St. Maries grew from late nineteenth-century logging, including a sawmill built by Joseph Fisher and his brothers in 1889, and became known for lumbering and paddle wheelers serving Coeur d’Alene. Other byway sites include White Pine Drive, bordered by old-growth forest and giant white pines; the Palouse Divide Nordic Ski Trails and surrounding mountain recreation area; historic Potlatch, established in 1905 with Frederick Weyerhaeuser’s white pine mill; Laird Park, where evidence of mid-nineteenth-century gold mining remains; and the Old Sampson Trail, officially designated in 1933 in recognition of its significance as Idaho’s first attempt to maintain a large-scale transportation corridor.