You enter Idaho shortly after clearing the summit of Teton Pass. The road drops down, down, down into the Teton Basin country on the west side of the mountain range. After driving through the small communities of Victor, Driggs and Tetonia the Route 33 turns and heads directly west toward Rexburg.
This is the view looking back toward the Teton mountains from Rt. 33 as it leaves the Teton Basin.