The Celts fled in confusion, and the road to the Alps was opened.

Thus Scipio was outgeneralled in the very beginning.
His course now should have been to return to Northern Italy with all his forces, and take every means to check Hannibal there.

Instead, he sent most of his troops to Spain under his brother Gnaeus Scipio, and himself, with but a few men, set sail for Pisae.
Meanwhile Hannibal hurried up the valley of the Rhone, across the Isara, through the fertile country of the Allobroges, arriving, in sixteen days from Avenio, at the pass of the first Alpine range (Mont du Chat).
Crossing this with some difficulty, owing to the nature of the country and the resistance of the Celts, he hastened on through the country of the Centrones, along the north bank of the Isara.

As he was leaving this river and approaching the pass of the Little St.Bernard, he was again attacked by the Celts, and obliged to make the ascent amidst continual and bloody encounters.

After toiling a day and a night, however, the army reached the summit of the pass.