Change is in the air. Fall arrives with the Autumnal Equinox on September 23. Butterflies and birds are migrating though the park. Groves around the Bear Valley Visitor Center and at the Point Reyes headlands are busy with twitters, flashes of color, and a steady stream of curious birders. Poison oak offers a bit of crimson to the landscape. While these cycles occur every year, there are always differences too. As the old saying goes, “You can never step in the same river twice.” Every encounter with a river – or the Point Reyes National Seashore – is bound to be different from any you have had before.