A moontain pass is a route throu a moontain range or ower a ridge. If follaein the lawest possible route, a pass is locally the heichest point on that route. Syne mony o the warld's moontain ranges hae presentit furmidable barriers tae travel, passes hae been important syne afore recordit history, an hae played a key role in trade, war, an migration.