September 25, 2005 September 26, 2005 Depart Yellowstone for about 9hrs of driving &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Exit the West Entrance of Yellowstone Park &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Take US-20 W (107 miles) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Merge onto I-15 S toward Arco/Pocatello (46.9 miles)) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Merge onto I-86 W via Exit 72 toward Twin Falls (62.9 miles) I-86 W becomes I-84 W (292.7 miles) Stop in Baker City at Forest Headquarters for directions on where to camp Camp overnight at <a href="http://www.fs.fed.us/r6/w-w/">Wallowa-Whitman National Forest</a> Depart W-W Nat Forest and continue drive to <a href="destination.jsp?name=portland">Portland, OR</a>