Journey through the legendary Anton Anderson Memorial Tunnel — the longest highway tunnel in North America — and emerge into the Portage Valley, where the lake-blue face of Portage Glacier commands the horizon. A profound Alaskan landscape just minutes from port.
What to expect
The moment the tunnel opens and Portage Valley's snow-ringed peaks appear is genuinely cinematic. You arrive at Portage Lake with the glacier reflected in milky-blue water and mountains rising sheer on every side. The Begich Boggs Visitor Center provides excellent context on glacial dynamics with ranger-led exhibits, and the short lakeside trail offers extraordinary photographic compositions. If a cruise vessel is running on the lake that day, an optional glacier boat adds another dimension. The drive back through the tunnel — this time knowing what lies on either side — feels like crossing between worlds.
Good to know
The tunnel operates on a timed alternating-direction schedule; your guide manages timing. Allow at least 2.5–3 hours for a meaningful visit. Pre-book with Alaska Shore Excursions to secure a confirmed departure slot aligned with your ship's schedule.
Sail there
Luxury cruises that call at Whittier — book through us, the fare is identical and your concierge stays on your side.