Heliskiing is off-trail, ownhill skiing that is accessed by a helicopter, not a ski lift. Heli-skiing is essentially about skiing in a natural -- albeit highly selected -- environment without the effort or gear compromise required for hiking in. Most heli-skiers are seeking specific, pleasurable skiing conditions that are hard to replicate in the highly manipulated terrain of ski resorts: particularly powder snow, but also long descents, natural terrain contours and features, smooth corn snow, old-growth tree glades, steep and extreme slopes, or for the more adventuresome, wild snow and a natural, variable environment. The presence of the guide and machine offer some protection against the risks and discomforts unavoidably associated with entering this mountainous environment, allowing skiers with little or no mountain sense to enjoy a wild environment.