Ralph Summers Plaisted[1] (September 30, 1927 – September 8, 2008) was an American explorer who, with his three companions, Walt Pederson, Gerry Pitzl and Jean-Luc Bombardier, are regarded by most polar authorities to be the first to succeed in a surface traverse across the ice to the North Pole on April 19, 1968, making the first confirmed surface conquest of the Pole.