Information about visiting the Yukon, including how to get here, can be found at the Yukon Government Department of Tourism & Culture website.
Whitehorse is easily accessible by air, sea and road.
If you're considering travelling to Whitehorse by air, please note that the following airlines have scheduled jet service to Whitehorse:
All access roads (indeed, most roads in the Yukon) are paved. There are some gravel roads (e.g. the Dempster Highway), but they are well maintained, all-weather roads. If you are bringing your own car, or renting, you will do just fine in a compact car.
Road access to Whitehorse is via the Alaska Highway, originating in Dawson Creek, BC. and terminating near Fairbanks, Alaska. This 2300km (1400mi) highway is an all-weather paved road.
The distance from Edmonton to Whitehorse is 2010km. Driving time from Edmonton is approximately 22-24 hours (allow 2-3 days).
There is also road access to Whitehorse from Haines, Alaska and Skagway, Alaska. Driving time to Skagway is 1.5 hours. Driving time to Haines is 4-5 hours.
You can also get to Whitehorse by sea via the Alaska Marine Highway (coastal ferry) with departures as far south as Bellingham, Washington, USA. Once you arrive in Skagway or Haines (both in Alaska), you will need ground transportation to Whitehorse. Bus service from Skagway is available from Yukon Alaska Tours. Part of the journey (from Skagway to the Canadian border at Fraser) can be made on the scenic Whitepass and Yukon Route Railway.