The foreland (eastern) edge of the southern Canadian Cordillera consists of a series of structures that form the leading edge of a tectonic wedge that has propagated to the foreland. The Highwood Structure is approximately 100 kilometres long and is one of the largest structures within the leading edge of the wedge. This structure is an antiformal stack with a foreland-directed floor thrust, the Outwest Thrust, and a hinterland-directed roof thrust, the Chain Lakes Thrust. The Outwest Thrust is a blind thrust and merges with the Chain Lakes Thrust in the subsurface. The southern end of the Highwood Structure plunges to the south. The southern plunge coincides with an oblique ramp within the hanging wall of the Outwest Thrust. This ramp cuts upsection to the south from the basal units of the Mississippian section into younger Mesozoic strata. To the south, the Highwood Structure dies out and another structure, the Oldman Structure, forms to the hinterland to create a right-stepping en echelon map pattern. In the northern end of the structure, the plunge of the Highwood Structure reverses to the north. The change in plunge direction coincides with the development of the Turner Valley Structure to the foreland, which forms the leading edge of the wedge. Thus, the Highwood Structure is not at the leading edge of the wedge in the north. In the north the Highwood Structure formed prior to deformation associated with the Turner Valley Structure. However, in the south deformation associated with the Highwood Structure occurred at approximately the same time as deformation associated with the Turner Valley Structure.