Lucky enough to live at the entrance to Oetztal, Solden has enough for 2 days but you would probably start to struggle a bit for longer. Serfaus is not so far away, maybe an hour, very much a bike park but good for all abilities. Possibilities for bits of natural stuff, you just have to know where to find it and be willing to put the effort in.
Another option is to try and tie it in with the World Cup and head off down to Leogang for a party and maybe a day or two of riding down there after the WC.
IMG_2776 by andykentos[/url], on Flickr
IMG_2021 by andykentos[/url], on Flickr
IMG_0083 by andykentos[/url], on Flickr