Discover Portage Glacier

Step aboard the M/V Ptarmigan, a custom-designed vessel with a heated cabin and open-air top deck, offering unmatched glacier views. Glide across iceberg-dotted waters, marvel at cascading waterfalls, and get up close to the towering face of Portage Glacier. A U.S. Forest Service ranger narrates the journey, sharing fascinating insights into Alaska’s natural wonders in the Chugagh National Forest and Portage Valley.

About the Cruise

This cruise offers a rare chance to see one of Alaska’s most accessible glaciers up close, making it a must-do experience for visitors of all ages. The short, one-hour duration makes it easy to fit into any itinerary while still providing incredible views and a true taste of Alaska’s wild beauty. Five departure times are available every day, May 15th through September 16th, 2025.

M/V Ptarmigan Highlights

The only boat operating on Portage Lake
Onboard Narration
Fully enclosed, heated cabin
Expansive windows for enhanced viewing
Topside view-deck offers a great vantage point for watching the glacier “calve,” and for visitors to enjoy the fresh air
Holds up to 144 passengers
80-foot vessel was built on site at Portage Lake to U.S. Coast Guard specifications
6.5-foot draft for minimal environmental impact
Sound system cannot be heard from the shore, ensuring preservation of this naturally peaceful setting for wildlife and other visitors
Hull designed for safety in ice-filled waters
Operates under special use permit with the Chugach National Forest and is an equal opportunity provider

Driving Directions

Take the Seward Highway south from Anchorage
Take a left on Portage Glacier Road (milepost 78.9) approximately 48 miles out of Anchorage
Travel 5 miles to fork in road; take the right-hand fork and travel a 1/2 mile. Turn left at the Portage Glacier Café (401 Portage Lake Loop)
Arrive at 1500 Byron Glacier Road, Girdwood AK 99587

1500 Byron Glacier Road
Girdwood, Alaska 99587
(907) 465-7025