Going-to-the-Sun RoadSun Road

Completed in 1932, this 52-mile road combines both history and unparalleled scenery. It bisects the heart of Glacier. Its construction made accessible the remote back country of the park to everyone. While portions of this scenic route remain open year-round, the higher sections are generally not open until late May or June and close the third Monday in October, unless closed earlier by snowfall.

To help reduce congestion along this narrow winding road, vehicle size restrictions are in effect. Over time, it became apparent that the road was not designed for the number or size of today's vehicles. Larger vehicles frequently had difficulty negotiating the sharp corners and often caused considerable traffic delays. To allow for a safe and enjoyable experience, vehicle size restrictions are in effect at all times.

Going-to-the-Sun Road -Vehicle Size Restrictions

Vehicles, and vehicle combinations longer than 21 feet (including bumpers) and wider than 8 feet (including mirrors), are prohibited between Avalanche Campground and the Sun Point parking area. Alternative transportation is available.

Car Table

Waterton-Glacier's Weather

Waterton-Glacier's western valleys generally receive the most rainfall, but daytime temperatures can exceed 90 degrees F. It is frequently 10 to 15 degrees cooler at higher elevations. Sunny days often predominate on the east side of the park; however, strong winds frequently occur. Overnight lows in the park can drop to near 20 degrees F, and snow can fall anytime.

Prepare for a variety of conditions and pack accordingly. You may start in a T-shirt and shorts, and need a parka by evening. Dress in layers. Always bring rain gear.

The data shown here was collected over the last ten years at Park Headquarters in West Glacier, at an elevation of 3200 ft. Temperatures and rainfall amounts are often much different in other parts of the park.

Month Average Rainfall Average High Average Low
May 2.97" 16 days 65 °F 37 °F
June 3.35" 15 days 71 °F 45 °F
July 1.95" 11 days 78 °F 49 °F
August 1.45" 9 days 78 °F 48 °F
September 1.83" 9 days 63 °F 38 °F