Karl Koster, in the interpretive role of a gentleman, heads from the great hall toward the canoe warehouse June 17, 2016, at Grand Portage National Monument. The site is one of a handful of National Park Service sites in Minnesota. The NPS is marking its 100th anniversary. The monument will mark its fur-trading history with a rendezvous that will bring a tall ship to the bay Aug. 13. When actual traders and voyageurs congregated at the site, they would have numbered 2,000.