Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
That is number of feet of vertical rise or descent — hiking uphill or downhill. Naturally hiking uphill is more demanding than hiking on a flat trail. Hiking downhill is often easier, however, long descents can be difficult, perhaps more demanding than hiking up hill. A 3,000′ foot ascent is not straight up, but an ascent over several miles.
