Ik denk dat je toch wel veel terug moet kunnen vinden op de websites, maar het zal natuurlijk van jaar tot jaar verschillen. Juni is redelijk vroeg, wij hadden in 2006 (zie ons reisverslag) in juli nog aardig wat sneeuw overal. Alle wegen waren toen wel open.
Glacier zal lastig worden, zie de NPS-site:
Plowing on the Going-to-the-Sun Road begins in April. Ten miles of the Going-to-the-Sun Road (from park headquarters at West Glacier to Lake McDonald Lodge) are maintained throughout the winter providing access to winter recreation opportunities at the head of the lake. Due to road rehabilitation, for the next 8-10 years, weather permitting, the entire Going-to-the-Sun Road will be open for public vehicle access from mid-June to mid-September.
Marianne