Two Jack Lake in Banff National Park is a phenomenal destination. It is very easily accessible from the Town of Banff either by car, bicycle and even foot (if you are feeling a little adventurous).
I have photographed this lake every season over the years and this is by far my favorite shot to date. It seemed rather impossible at the time as I had taken it at the end of August during a hot evening. A very large man decided to jump into the lake to cool off. Of course, even during the summer lakes being fed by snow melt are still freezing cold. With the screaming re: how cold the water was and also the endless waves being generated by the waddling about of this individual, it was a miracle I was able to capture a perfect reflection without an ND filter at hand.