Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment (hierarchy name)
4. Built Complexes and Districts (hierarchy name)
5. complexes (buildings and sites)
6. [complexes by function]
7. recreation areas
8. trails (recreation areas)

Anotations

Scope note:

Trails or slopes prepared for skiing, particularly trails through the landscape or trees, as distinguished from ski runs that are always downhill, and usually marked, patrolled, and graded according to difficulty.