<P> The Continental Divide Trail (CDT) follows the Divide through the U.S. from the Mexico--US border to the Canada--US border . The trail itself is a corridor of pathways - i.e. dedicated footpaths or back roads, either on or near the Continental Divide . A less - developed Canadian extension called the Great Divide Trail continues through five national parks and six provincial parks, ending at Kakwa Lake in east - central British Columbia . </P> <P> Many endorheic regions in North and South America complicate the simple view of east or west, "ocean - bound" water flow . Several endorheic basins straddle or adjoin the Continental Divide, notably the Great Divide Basin in Wyoming, the Plains of San Agustin and the Animas Valley in New Mexico, the Guzmán Basin in New Mexico and Chihuahua, Mexico, and both the Bolsón de Mapimí and the Llanos el Salado in Mexico . Such basins can be, and routinely are, assigned to one side of the Divide or the other by their lowest perimeter pass; in other words, an assignment is made by determining how the drainage would occur if the basin were to be progressively filled with water until it overflowed . Large - scale maps, such as those on this page, often show double divide lines when endorheic basins are involved . However, the detailed USGS topographic maps of the United States generally show only the main Divide as determined by the overflow rule . Among other things, this eliminates the need to trace out the boundary for a basin that is very shallow and has a nebulous rim, such as the San Luis Closed Basin in Colorado and the sink of the lost streams of Idaho . </P> <P> Another rare exception occurs when a stream near a divide splits and flows in both directions, or a lake straddling the divide overflows in both directions . Examples of these are, respectively, North Two Ocean Creek and Isa Lake, both located on the Continental Divide in Wyoming . The Panama Canal has this same feature, but is man - made . Both the Chagres and Gatun rivers flow into Gatun Lake, which empties to both oceans . </P> <P> Several small lakes along the Divide in the Rocky Mountains between Alberta and British Columbia flow into both provinces and thus into both Atlantic and Pacific Oceans . An example is the "Committee Punch Bowl", a small lake located in the Athabasca Pass named by Sir George Simpson, governor of the Hudson's Bay Company, while touring his vast Canadian fur - trading empire in 1825 . According to historical sources, "The small circular basin of water at the summit, twenty yards in diameter, is dignified with the name of the' Committee's Punch Bowl' in honour of which the Governor treated them (his fur traders) to a bottle of wine as they had' neither time nor convenience to make a bowl of punch, although a glass of it would have been acceptable ."' The reference is to the governing committee of the Hudson's Bay Company in London, England . </P>

Where are the continental divide and the fall line located