Oh, it is definitely walking distance. It is right across the street form the GCH. Don't follow the signs on the PPH property to get to the gates of DL or DCA. That path will seem endless and you will be cursing the fact that you chose to stay at PPH. What most of us do is take the 'short cut.' What you will do is go out the front of the PPH, past the Valet parking guys, veer a little bit to the left and walk to the crosswalk. Cross the street to the GCH and cut through the gorgeous lobby, then head out onto DTD and to the parks. Not only is this a shorter way of doing it, but a more entertaining way, I feel. Then, just reverse the process on the way back - take DTD to the GCH, cut through the GCH lobby and out the front entrance, veer to the left, walk to the crosswalk and cross the street to the PPH!