 We use high-resolution radars at Constellation Mission imagery to determine motion across Glacier in this St. Elias Icefield, finding that faster motion occurs for Yukon Glacier draining southward and westward to Alaska's coast, while slower motion is observed for land terminating Glacier draining eastward and northeastward. We also identify two new Glacier surges and track their progression using repeat RCM imagery. Our results demonstrate the utility of RCM data in determining Glacier motion across complex topography and support process-based studies of fast-flowing and surge-type Glacier. This article was authored by Wesley Van Weitgen, Courtney Byer, Lip Copland, and others.