We hike the 11.6 mile long Highline Trail to the Granite Park Chalet and back down to the loop in August. The best part of the day was when we saw 8 bighorn sheep in the parking lot just as we were pulling up! The Highline Trail is a really nice trail, though. It starts off very rocky and immediately climbs above the Going to the Sun Road. Even though the trail is fairly wide, they have installed a steel cable for hikers to hold on to if needed. After passing the rocky cliff area, the trail continues to follow the road before reaching a saddle between the Continental Divide and Haystack Butte. It then splits away from the road and continues to the Granite Park Chalet. There was a large snowfield near the saddle that apparently never melts! Most of the trail was at or above treeline, and was surrounded by beautiful wildflowers. Halfway into the hike, we were rewarded with incredible views of the mountains surrounding Lake McDonald. After 7.6 miles, we reached the Granite Park Chalet, which was built in 1915 to provide overnight accommodations for hikers and backpackers. From the chalet, we took the Loop Trail back to the Going to the Sun Road, which was steep and very hot in the summer sun. We did take the shuttle back to Lake McDonald, and would NEVER do that again. The shuttle was so slow and it took almost an hour just to get to the lodge.