With a surface larger than all the continents together, the Pacific Ocean is the most extreme environment a migratory bird can encounter. Yet there are several bird species that conquer this enormous body of water almost routinely. Migratory bird researchers now provide a synthesis of all the knowns, and especially the many unknowns about the extreme performances of migratory birds such as bar-tailed godwits, whimbrels and red knots, which fly over the Pacific Ocean.