Two portions of the route, which have largely escaped development, are part of a National Historic Landmark District, designated in 1966 to commemorate this achievement.

The team celebrated Independence Day at the upper camp, and departed upstream on July 15, having constructed two additional canoes to compensate for the loss of the boat.

[3] Two separate portions of the expedition portage route form part of the National Historic Landmark District designated in 1966.

[3] The other element of the portage that is landmarked is the last 2.5 miles (4.0 km) of the route, extending from Mount Olivet Cemetery to the White Bear Islands area (approximately 47°27′34.7″N 111°17′57.4″W / 47.459639°N 111.299278°W / 47.459639; -111.299278 (Upper camp)).

At the time of the expedition there were three White Bear Islands; one has since become attached to the western shore by silting action, and the actual camp site was probably some way east of the current eastern bank.