Groundwater Basics
Seepage into the ground is also strongly influenced by the season of ... During the cold months, the ground may be frozen, hindering water seepage, and evaporation is less. The ...
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Mariana,

Aquí está lo que buscas. Coladas, es un sinónimo de "desfiladeros", "congostos" y "garganta entre montañas"

«Geography» (desfiladero) mountain pass

http://forum.wordreference.com/showthread.php?t=1538584

Re: Colada (mountains)

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Las coladas son un tipo de via de transhumancia por la que se lleva y trae ganado desde y hacia las zonas de pasturas.
Quizás puedas ponerlo como transhumance paths o tracks o routes.


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Note added at 19 hrs (2010-03-25 22:28:14 GMT)
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Saludos,
eski

vías pecuarias (cañadas, coladas, veredas, etc.)

The three terms that are juxtaposed between parentheses evidently constitute a list of terms synonymous with “vías pecuarias”, which is the scientific term. In other words, all mean “cow track”. I recognise cañadas (the term used in Spain, I seem to recall) and veredas. Evidently colada is another synonym.

Why this plethora of synonyms? I used to be a Spanish translator at the UN in New York City (in pre-internet days), so I’m acquainted with the milieu. The reason is that, although the three terms may mean the same thing, they are used in different regions and/or countries.

On the other hand an average Spanish-speaker knows only the term used in his own community, region or country. Consequently, when an organization like a ministry, an oil company, a fertilizer manufacturer, etc. writes a text that is intended for national or international distribution (which is the rule), it is useful, and sometimes necessary in Spanish to resort to a number of synonyms to make a new concept clear to readers who speak different dialects of Spanish. From the selection of synonyms, it appears that this writing is intended for an international public.

This is especially the case for concepts, such as “cow track", that are used principally in rural areas, because these areas are usually fairly isolated from outside influences.

Final question, how to deal with these synonyms? My advice: ignore the three term between parentheses. Or else write (“cow-track”, “cow-track, “cow-track”).