Autumn is a spectacular time to visit Denali National Park. The alpine and subalpine tundra at higher elevations gleam with fall color by mid- to late-August. The taiga at lower elevations is aglow in reds by early September, a time when the aspen and balsam poplar near the park entrance turn brilliant yellow and gold.

President Donald Trump will deliver remarks during this year’s observance ceremony at Flight 93 National Memorial in Pennsylvania on the anniversary of the September 11 terrorist attacks.

Though volunteers help out public lands throughout the year, once a year everyone is invited to lend a hand. This year National Public Lands Day falls on September 22, and there will be events across the country, and the National Park System, looking for volunteers.

National Park Service staff, who have been asked to relax sport hunting regulations for wolves and bears in national preserves in Alaska, are relying on the state of Alaska's position that increased hunting of the predators will not have an overall impact on their populations. But the regulatory changes likely would reduce opportunities for wildlife viewing and degrade wilderness character in the preserves, the Park Service adds in an assessment of the rule changes.