Desire lines, desire paths, desire, ease of movement, natural access.
Paths that are developed by natural usage, often following natural geographical features such as streams, contours and direct routes rather than the route dictated by concrete and governance.
A desire path (formally referred to as desire line in transportation planning, also known as a game trail, social trail, herd path, cow path, goat track, pig trail or bootleg trail) can be a path created as a consequence of erosion caused by human or animal foot-fall or traffic. The path usually represents the shortest or most easily navigated route between an origin and destination. Width and erosion severity can be indicators of how much traffic a path receives. Desire paths emerge as shortcuts where constructed ways take a circuitous route, have gaps, or are non-existent.