This is a film that begins as a meditation on living in nature, under the principles support the idea behind the title, and then soon becomes an examination of two people trying to make their way in a bustling city.  LEAVE NO TRACE reminded me of A24's ROOM in an inverse way, but it also recalls certain moments of THE HURT LOCKER.  Ben Foster and Thomasin McKenzie give very natural performances as the father-daughter who try to cling to each other, although the daughter begins to feel a pull once she reaches Portland.  A wonderful film by Debra Granik.