Mike, we think alike, Chamonix is on our list! If we have a clear day it would be nice to get close to Mont Blanc early in the morning. Already mapped out two routes depending on time allowed, highway 1hour 8 minutes, back country roads 2hr 04 min (country roads preferred). If time allows a cable car or train ride up in elevation would be perfect, have you done this? FYI, in Virginia we hit 100 degrees and as I write this....98 degrees at 1640 hours, ugh!