The Monson Appalachian Trail Visitor Center is asking hikers to avoid hiking MT Katahdin over Labor Day Weekend (Sept 1-3) out of respect according to their Facebook page
"Each year, members of the Penobscot Nation participate in the Katahdin 100, a spiritual pilgrimage from Indian Island, in the Penobscot River north of Bangor, to Katahdin. Katahdin is sacred to the Penobscots, and the mountain was part of their territory for millennia before the A.T. existed. Katahdin Stream Campground, at the base of the A.T. route up Katahdin, will be closed to overnight guests Saturday September 1 and Sunday September 2 so that the Penobscots may conduct their traditional ceremonies. With regard to day-use parking, there are no passes remaining for either of those days. Although The Birches (a satellite of Katahdin Stream Campground reserved for long-distance northbound hikers) will remain open to 12 hikers each night, the area will be very busy: the congestion will make it difficult for drivers coming to pick up hikers and for hikers seeking rides out of the park. Therefore, we strongly suggest that hikers avoid summiting Katahdin on September 1, 2, or 3. If at all possible, please consider summiting before Saturday September 1, or delaying your entry into the park until the afternoon of Monday September 3, for a summit date of Tuesday September 4. Thank you in advance for your consideration."