Originally Posted by Laury
From what I've read, the only way that you're able to step on the Mendenhall Glacier is by helicopter. You can hike around the Visitor Center on mapped trails, which provides great views. To my knowledge, you can look, but ya can't touch.
There is a trail on the West side that leads to an "on ice" path. There are guided treks (NorthStar Trekking and Above & Beyond AK) that take this hike and guide you on the ice as well.
Both of these excursions are great, but not for anyone with a short port time.