The weather was so nice we decided to take the top off the car, and were on the road by 10 am. The line at the West Glacier entrance was "glacial" in its movement. It seemed every single car had multiple questions for the rangers. It took so long I had time to get on the internet with my Kindle and buy two books to read later in the evening. Anyway, finally we got to the kiosk, showed the nice ranger lady our Golden Age pass, and were waived through.
We arrived at MacDonald Lake Lodge around 11:20, found a parking spot in the same place we parked in the last time we were there when we drove the "Going to the Sun Highway" from the St. Mary entrance. The trailhead was right across the street from the entrance to the lodge. We were on the trail by 11:30, which we found out was also a heavily used horseback riding trail, so we were dodging horse dodo for a couple of miles. The hike up to MacDonald Falls is about 2.5 miles, and it was mostly in the shade which we appreciated.