- Who
- Ralph Plaisted, Jean-Luc Bombardier , Gerald Pitzl , Walter Pederson
- What
- / first
- Where
- Not Applicable (North Pole)
- When
The earliest indisputable attainment of the North Pole by surface travel over the sea-ice took place at 3 p.m. (Central Standard Time) on 19 April 1968, when expedition leader Ralph Plaisted (USA), accompanied by Walter Pederson, Gerald Pitzl and Jean Luc Bombardier, reached the pole after a 42-day trek in snowmobiles.