Deep seated retrogressive earth slides along the walls of the Little Smoky River valley, in northwestern Alberta, have lead to significant ongoing maintenance on Highway 49 for the past 50 years. While localized, higher velocity zones, have lead to site specific investigation and monitoring, the overall deformation patterns of the valley walls is not well understood. Previous studies and field reconnaissance have highlighted a series of younger, more active slides, superimposed on older, less active slides, lending to the complexity of the deformation and velocity patterns. As the site is heavily vegetated, a set of 18 corner reflectors designed to work with current space-borne SAR systems were built and installed over the walls along both sides of the valley during the fall of 2006. The corner reflectors can provide point measurements with subcentimetre accuracy with a high level of confidence using InSAR technology. The initial year of data exhibits clear trends for reflectors moving in the satellite line-of-sight.