Abstract.-Populations at the edge of the natural range of a species may deal with ecological challenges that differ from those at the core of the range. These differences can result in different patterns of resource use, which may confound resource managers and conservation biologists who must develop management strategies based upon the best available information. One such species is the Eastern Hog-nosed Snake (Heterodon platirhinos), a species of conservation concern in the northeastern part of its geographic range due to habitat loss, declines in amphibian prey species, and wanton killing. To address these knowledge gaps, we used radio-telemetry to study the spatial ecology and natural history of six H. platirhinos at the northern-most portion of the range of the species in New York. Snakes that we tracked had mean home-range sizes (100% minimum convex polygon = 23.7 ± 21.2 ha) smaller than populations reported in New Hampshire, Massachusetts, Arkansas, and Ontario. Snakes also used forests extensively, although compositional analysis revealed that they selected open and edge habitats in greater proportion to their availability, consistent with other studies. Snakes were more likely to be found in close proximity to coarse woody debris than was randomly available, and they selected microhabitats with denser vegetation than average, but we found no evidence of selection for ground cover, canopy cover, or proximity to trees.