The avenue verte does the job of making those 55km fairly inconsequential. However it is the bottom of the valley and can be dead cold even in the summer. I have done it about 8 times in all seasons and it is always the case to some degree ( I had some snow in easter ). One year i took other roads on the surrounding "plateau" and it is a much better view if you don't mind riding on the dark.
The avenue verte does the job of making those 55km fairly inconsequential. However it is the bottom of the valley and can be dead cold even in the summer. I have done it about 8 times in all seasons and it is always the case to some degree ( I had some snow in easter ). One year i took other roads on the surrounding "plateau" and it is a much better view if you don't mind riding on the dark.