yep ground level in alps is going to be something like 6000 feet
FWIW according to French TV news/local reports it now seems the main area of interest is at or above 2700 metres (around la tete d'lestrop) members of the "mountain Gendarmes" (they do most of the mountain SAR in France) and other teams are struggling to reach the impact site by ski/ snow shoes, and /or helicopter. There's significant low cloud in the area.