bootleg trail
n.— «Master Naturalists also spend a lot of time using brush, logs and leaves to obscure what rangers like Mullins refer to as “bootleg trails,” unplanned, unsanctioned paths that have emerged in the mountainside due to the repeated shortcuts of hikers who leave the designated trails.» —“Naturally useful” by Kyle Brazzel Arkansas Democrat Gazette Sept. 3, 2007. (source: Double-Tongued Dictionary)