El Malpais National Monument
is bounded by two roads - NM 117 along the east edge and NM 53 to the west. Distances of selected locations from Grants include Sandstone Bluffs Overlook (19 miles), La Ventana Natural Arch (25 miles), Lava Falls (37 miles), El Calderon (22 miles) and Big Tubes (37 miles). Apart from interstate 40 in the north, the only other route linking the two sides of the monument is NM 42, a rough, unpaved forest track.
PDF format map of El Malpais National Monument
, from the National Park Service.