What a nice jaunt! It was beautiful hike on a late Saturday. We had a seminar in our glacier climbing course in the morning, and then just had to go somewhere and quick before dark, so we chose heather lake as we had done it 3 months prior in December. Since then we have been conditioning, so this was so quick and easy. There were some parts of the trail 3/4 of the way up that had patches of snow, but the real thing to watch for was the ice on the rocks. Much of the upper trail consists of predominantly roots and large boulders in and out of the trail. The ice hides on the rocks and makes it unclear where to step. Further up the trail there was only snow on the trail where it levels out until you get to the lake. The vertical gain on this hike is minimal, and recommended for anyone, as it might be wheelchair accessible (just kidding). You do lose some footage half way up where the trail descends a little bit, but a nice hike up from there. Towards the lake there were patches of ice where the trail almost is like a rollercoaster or bobsled course. Be careful! If you have instep crampons bring them! I decided to use my 12 points for part of the way back to break them in from being brand new and they worked like a charm! We noticed at the lake that some people were actually treading out o the lake that was iced over! There were also many footprints that led quite far off the rim of the shore (which is hard to tell), so don't be stupid, that are rarely people up there that are going to try and save you. Stay safe! Approx time 55min up - 45 min down.