Well, there is a LYS at 5 min. by bike, but it isn't a very good one, the hardly have anything and don't know a thing about knitting.
There is a yarn shop about 30 min by train and from the station it's also 10 min. walking. I live 15 min. from the station, so I usually go to that one. It's a rather large one and the women who runs it is really nice and helpfull.
I'm still looking for a good alternative, there is a yarn shop about 15 km away, but I haven't visited that one yet, so I don't know if it's a good one. That is still on my to do list