Region
Prudhoe Bay to Alaska/Canada border (Highway) route
6
Mackenzie River Delta
4
Yukon
4
North Slope
3
Northwest Territories
3
Prudhoe Bay
3
Alaska Highway corridor
2
Brooks Range
2
Prudhoe Bay to Delta Junction route
1
Sadlerochit Reservoir
1
Tanana River Valley
1
Tanana River watershed
1
Yerrick Creek
1