Lake Alexander, located in the Tongass National Forest of Alaska, offers a remote wilderness paddling experience as part of the Admiralty Island Canoe Route. Access to the lake is via floatplane or canoe/kayak with portage, with the nearest launch point being about 6.5 miles away at Mole Harbor. The lake is typically ice-free from mid-May through November.

Paddlers can explore the scenic 350-foot elevation lake surrounded by old-growth forest, with distant rocky peaks visible along the island's high crest. Wildlife viewing opportunities abound, including Sitka black-tailed deer, bald eagles, and brown bears. Anglers may catch cutthroat trout and Dolly Varden.

A rustic cabin is available for overnight stays on the northwest end of the lake, accommodating up to 6 people. The cabin includes basic amenities like wooden bunks, a wood stove, and an outside toilet. A skiff with oars is provided for use on the lake, though bringing your own oars is recommended. Motors under 10 horsepower are permitted.

From the cabin, paddlers can access a 2.4-mile trail to Mole Harbor from the east end of the lake. Another route leads to a 0.25-mile trail to Hasselborg Lake from the west end of Beaver Lake. These trails are part of the larger Admiralty Island Canoe Route, which links seven mountain lakes through portages of varying difficulty.

Safety considerations include proper food storage due to bears in the area, cold water temperatures, and the extremely remote location with no services. All water should be treated before drinking. Visitors must be entirely self-sufficient and prepared for extended stays in case of weather delays.

The lake is part of the Kootznoowoo Wilderness, which encompasses 956,255 acres of Admiralty Island. This protected status helps maintain the pristine nature of the lake and surrounding landscape.