Idaho Code § 49-708: Pedestrians on highways.

(1) Where a sidewalk is provided and its use is practicable, it shall be unlawful for any pedestrian to walk along and upon an adjacent roadway.

(2) Where a sidewalk is not available, any pedestrian walking along and upon a highway shall walk only on a shoulder, as far as practicable from the edge of the roadway.

(3) Where neither a sidewalk nor a shoulder is available, any pedestrian walking along and upon a highway shall walk as near as practicable to an outside edge of the roadway, and, if on a two-way highway, shall walk only on the left side of the highway.

(4) Except as otherwise provided in this title, any pedestrian upon a roadway shall yield the right-of-way to all vehicles upon the roadway.