While you cannot actually approach the glacier. There are excellent trails and a very worthwhile visitor center. Accessible only by boat is the incredible Tracy Arm, about 75 miles south of Juneau by water. Deep in a narrow, deep fiord lie two active glaciers. Iceburgs are everywhere, often larger than a house.
Seals abound, and raise their young on the smaller iceburgs.
Bears and even Mountain Goats are often sighted on the steep mountainsides that drop straight to the water's edge. The trip to Tracy Arm can be done in either four or five days, round trip form Juneau. Seven days are required for a trip around Admiralty Island with a stop at Tracy Arm. Admiralty Island is home to the highest concentration of Brown Bears in the world. Trips can also be one way from one town to another, with a ferrry or plane carrying you to another destination.