Deep enough to submerge an 80-story building, the lake was carved out over thousands of years of glacial advances. While Salmon make their way into the lake, you may not see them due to the immense deposits of glacial silt. The silt also protects them from predators such as birds and larger fish. However, they eventually make their way to clearer waters. Look for dense blue icebergs from Portage Glacier blown to shore.
For an otherworldly encounter with a famous glacier you can’t easily approach or even glimpse during summer, lead the family across frozen Portage Lake to a fantastic wall of jumbled, blue ice. Once the lake surface has frozen solid, people flock across on foot, ice skates, skis and bikes. 50 miles from Anchorage.