To "louise":
I don't have a lot of experience with places to walk around here. But I have a book with some suggestions. Here are three that sound good to me. All three are said to be good walks in the winter.
- a 10km walk from Aying S-Bahn stop that circles back to the Aying S-bahn. This is SE on the S6.
- a 9km walk from Ottenhofen S-bahn stop that circles back to the S-bahn station. This is NE on the S2.
- a 12km walk from Grafrath S-bahn stop that makes an arc through the countryside to Schöngeising
S-Bahn station. This is SW on the S4.
I don't know for sure if these are nice walks or not since I've never tried them out but if you are interested in going with me send me a private message. If the weather is too terrible this weekend, perhaps next weekend.