The best time to visit Glacier is generally during the summer months, from late June to early September, for the most accessible and enjoyable experience.During this period, the weather is typically warm and sunny, with temperatures ranging from 20-25°C (68-77°F) during the day. This is when all hiking trails, roads, and facilities are fully open, including the iconic Going-to-the-Sun Road. It's ideal for outdoor activities like hiking, cycling, and kayaking, with longer daylight hours allowing for extended exploration.For those looking to avoid the peak season crowds while still enjoying good weather, late May to early June or mid-September to early October can be excellent alternatives. In late spring, you'll find fewer people, but some higher elevation trails and roads might still be snow-covered. Autumn offers stunning fall foliage and cooler, crisp air, though some services may begin to close towards the end of the season.Winter, from November to April, transforms Glacier into a serene, snow-covered landscape. While beautiful, it's a very different experience with limited access, as many roads are closed and facilities are shut.