There is an award-winning craft brewery in Whitehorse
http://yukonbeer.com/Well worth a visit and tour there when you're going back through Whitehorse. Their dark beers are especially tantalizing. They have a six-pack that is aptly called, "The Dark Side" which is comprised of three different dark brews, Bonanza Brown being my favorite.
Other brews include:
Chilkoot – Lager
Deadman Creek - Cranberry Wheat
Discovery – Honey E.S.B
Ice Fog – India Pale Ale
Midnight Sun - Espresso Stout
Lead Dog - Olde English Ale
Yukon Gold - English Pale Ale
Yukon Red - Amber Ale