A Klondike variant with no stock: all 52 cards are already in the tableau. Move them to the four foundations by suit, Ace to King.
Yukon is a variant of Klondike and shares its naming inspiration: the Yukon river and territory in Canada, scene of the 1896–1899 gold rush. It carries the same aura of adventure in the frozen north that named the world's most famous solitaire.
One rule change makes it quite a different game: there is no stock to draw from — all 52 cards start in the tableau — and you can move any face-up card, carrying everything on top of it, even if it is not in order. That opens up far more possibilities each move.
Because it doesn't depend on the luck of a draw pile and leaves almost everything in view, Yukon is a favorite of planners — and it inspired even tougher variants, like Russian and Alaska, which build by suit.