patrolled terrain - / pəˈtrəʊld teˈreɪn / -
noun
An area of a mountain regularly patrolled by ski patrol / pisteurs and intended to be avalanche safe. This terrain may or may not be groomed, it is however patrolled and declared safe / open, or marked as closed by ski patrol.
\\ I wish the whole playground sector was patrolled terrain, there are too many FreeRider triggered slides there every season.
