Region
Alaska Highway corridor
10
Prudhoe Bay to Alaska/Canada border (Highway) route
8
North Slope
6
Mackenzie River Delta
5
Yukon
5
Prudhoe Bay to Delta Junction route
4
Brooks Range
3
Northwest Territories
3
Prudhoe Bay
3
Tanana River watershed
3
Tanana River Valley
2
Arctic Coastal Plain/Mackenzie River Delta/Mackenzie River route
1
Canada, Northwestern
1
National Petroleum Reserve in Alaska (NPRA)
1
Sadlerochit Reservoir
1
Yerrick Creek
1