The Klondike Railroads in Geographic Context of the Yukon River, Ft. Yukon, AK to Whitehorse, YT:
I used my Google Earth tool to obtain several views of the Klondike area from various angles and distances. This one sweeps across the upper Yukon River from Ft. Yukon--originally a British outpost--to Dawson City and beyond. The yellow line is the international border.
Those two most distant thumbnail markers are placed at Whitehorse and Dease Lake, which is part of the proposed railroad extension that would connect Prince George, B.C. to Alaska via the Cassiar and then the Alcan Highways. Note how all of these markers are almost in the same axis.
No modern proposals exist for a railroad line from Whitehorse to the Klondike area. All recent proposals bring the line through the border near Northway, following the more southerly route of the Alcan.