When are the Going-To-The-Sun Highway and the Chief Mountain Border Crossing open?
The Going-To-The-Sun Highway generally opens around the middle of June. This opening is highly weather dependent so depending on the snow cover the opening date may change. Further information contact: Glacier Park Information, P.O. Box 128, West Glacier, MT, 59936 Phone: 406-888-7800 Chief Mountain Border Crossing open May 15 9am to 6pm. Starting June 1 summer hours will be 7am to 10pm.