Byron Glacier (trail head) is an easy, worthwhile stop south of Anchorage. It's very close to the Gray Line and Begich-Boggs Visitor Center. The trail is only about 0.8 miles long. It's a well-kept gravel trail that granny's motorized wheelchair could probably traverse. When you get there, don't be afraid to hike out across the rocks. Just don't get under any overhanging ice, as large chunks can break off and fall at random.