Sea kayaking, hiking, rafting and other outdoor adventures offer exhilarating ways to enjoy Juneau's wilderness. For something even more unique, take off in a small plane or helicopter to see the sights from above, then land right on a glacier to go hiking or dog-sledding. During the winter, hit the slopes for downhill skiing, heli-skiing, cross-country skiing, and snowboarding.
(source: http://www.traveljuneau.com/things_to_see_and_do/)