A sudden summer storm bringing torrential rain, plummeting temperatures, and potential high-altitude snow has forced Glacier National Park to temporarily close the alpine sections of Going-to-the-Sun Road. According to an emergency safety update from the National Park Service, the closure took effect at 2:00 p.m. on Sunday, June 28, 2026, cutting off traffic along the scenic corridor from Avalanche to Jackson Glacier Overlook.
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The preemptive shutdown follows a Prolonged Rain and Runoff warning from the National Weather Service. Glacier National Park warns that heavy downpours on the region’s steep terrain threaten to trigger unpredictable rockslides and cause small mountain streams to swell rapidly, creating highly hazardous driving conditions.
Travelers are advised to expect major disruptions. Rangers are issuing a stern warning to backcountry hikers, noting that high-elevation trails will be dangerous to navigate and urging everyone in the wilderness to take immediate steps to prevent hypothermia.
Park crews will continuously monitor the storm and intend to reopen the highway as soon as conditions improve. Because alpine weather can change in an instant, visitors are urged to check the official park website for real-time updates or sign up for text alerts by messaging GNPROADS to 333111.
