The continental divide is an "invisible" line that separates water flow
in North America. If you are west of the divide any water you see in rivers,
lakes, rain, etc. will eventually flow into the Pacific Ocean. If you are
east of the divide any water you see will eventually flow into the Atlantic
Ocean. The divide is marked on most maps and runs along the crest of the Rockies
through the Canada and United States and continues southward into Mexico and
Central America. A fun way to look at the concept is, if you urinate to the
east of the divide, you are helping out the Atlantic, to the west, you're
donating to the Pacific.
Camping on public lands away from developed recreation facilities. By definition,
dispersed campsites have no facilities so you will need to provide for your
own sanitation and potable water needs and you will need to pack out all trash.
Mountain passes are extremely frequent when traveling in the west. When
traversing a mountain range, it makes most sense to find the easiest place
to cross. These places are normally the little valleys that separate peaks.
This area, where a trail or road crosses through a range is called the pass.
Passes are frequently identified on maps with a specific symbol, the pass's
name and its elevation.