Why is the Brooks Range important to Arctic drainage systems?

The Brooks Range is vital to Arctic drainage systems because it serves as a primary continental watershed.12

The range acts as a drainage divide that separates water flowing in three distinct directions:
* Northward: Waters flow across the North Slope into the Arctic Ocean.12
* Southward: Waters feed into the Yukon River drainage system, which eventually empties into the Bering Sea.12
* Westward: Waters flow into the Kotzebue Sound.2

By functioning as this central divide, the Brooks Range dictates the flow patterns of major river systems across northern Alaska. Over time, these rivers have eroded headward into the mountains, creating low-elevation passes such as Anaktuvuk Pass, which serve as critical geographic features within the range.12