In reply to Elsier:
Hi there I live in the Ecrins southern french Alps
It is possible to do all those activities here in March, we have very good weather here in general, at the moment the snow is here so tues, weds I was ski touring, today climbing down the valley warm enough to climb tops off.
March last year had good weather so climbing and skiing was easy( in resort snow wasn't that great but ok)
Also as it was warm there was a mini melt and the rivers came up for kayaking, it normally drops cold again April may and has the real melt end in May, and then the kayaking season proper kicks off, there is every thing grade wise for white water kayaking and the best in France, if you won't flat water there is the biggest man made lake in France an hour away?
For climbing there are 80+ Sports crags here, some of the will be to shady or high then but lots will be fine,
Now the last two march's have been the same, so this one may be wet rainy and crap snow? But if you wait till last min it's a good bet,
If you would like an info please get intouch
Cheers Rob