Spring is one of the most beautiful times of year in Glacier National Park. One of Montana's quietest seasons, spring has a greater capacity for visitors in and around the park. Plus, with snow melting at lower elevations by late April or early May, many of the hiking trails (you can check the latest trail status here) on the outer edges of the park tend to be accessible by mid-May.
Spring is also the prime season to bike Glacier National Park's Going-to-the-Sun Road. Most years, you can drive your car to Lake McDonald Lodge or Trail of the Cedars and set out on your bike from there. Biking or hiking along the Going-to-the-Sun Road is one of the best ways to see the park and provides stunning views of snow-capped mountain peaks, low-hanging clouds and rocking waterways.
In terms of lodging, camping is available inside the park at Apgar and St. Mary campgrounds, while many gateway communities—specifically Browning, Essex, Hungry Horse and West Glacier—provide lodging options in spring.
When visiting Glacier National Park in spring, keep in mind that many amenities and concessioner services don't open until late May or early June. Plan to stop and pick up supplies, groceries and water before venturing into the park.