A cargo carrier adapted to be removably mounted to a roof of a vehicle includes a body portion and an interior space defined by the body portion. The cargo carrier further includes a lid portion that provides access to the interior space. The lid portion is releasably attachable to the body portion by relative linear motion between the lid portion and the body portion. The cargo carrier further includes at least one mechanical fastening assembly slidingly engageable with a complementary fastening assembly, wherein the mechanical fastening assembly prevents relative motion between the lid portion and the body portion. Another embodiment of the cargo carrier includes a lid cover constructed to coact with a space defined by the lid portion and the body portion. The lid cover creates mechanical interference to prevent relative linear motion between the lid portion and the body portion.