Monter sur le mont Blanc. ^Monter' is generally

intransitive ; — Il a monté sur un arbre, He ascended a tree. Monter sur une voiture, to get into a carriage.

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Monter à cheval {sur un cheval) mount on horseback. It is, however, ùsed transitively as well : — Il a monté la montagne, He bas ascended the mountain. Mous montions V escalier, We were going up the staircase. Note the use of the article with names of mountains ; le mont Blanc, le mont Sindi, le mont Viso {81, 24).