Great question — answering as the UphillTech team:
Did you see U.S. Customs pilot project expands to Waterton Lakes National Park - Lethbridge | Globalnews.ca ? The answers on the linked question date from 2017 and wouldn't have known this. U.S. Customs pilot project expands to Waterton Lakes National Park By Tom Roulston Global News Posted June 13, 2018 7:11 pm U.S. Customs and Border Protection (CBP) is rolling out a new pilot program in Waterton Lakes National Park for pedestrians who will be crossing the Canada-U.S. border into Glacier National Park. The Reporting Offsite Arrival-Mobile (ROAM) application , available for Apple and Android devices, will allow park visitors crossing into the U.S. via boat or on foot the ability to report...
Full answer by user112778: https://travel.stackexchange.com/a/158624 (CC BY-SA 4.0).
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