This pull-out won't be here forever. The fast-flowing, glacier-fed Matanuska River washes by right below, taking dirt and debris with it every day. This is an excellent example of a braided river. Matanuska Glacier, farther up the Glenn Highway, feeds this waterway. It's fast and cold, and can be extremely dangerous to navigate, though people do raft it. Historically, Natives and gold seekers used the frozen river for winter travel.