while the main park road goes straight through the middle of the denali national park wilderness, the national preserve and portions of the park not designated wilderness are even more inaccessible. there are no roads extending out to the preserve areas, which are on the far west end of the park. the far north of the park, characterized by hills and rivers, is accessed by the stampede trail, a dirt road which effectively stops at the park boundary near the "into the wild" bus. the rugged south portion of the park, characterized by large glacier-filled canyons, is accessed by petersville road, a dirt road that stops about outside the park. the mountains can be accessed most easily by air taxis that land on the glaciers. kantishna can also be reached by air taxi via the purkeypile airport, which is just outside the park boundary.