Rabbi, when I was growing up our parish church was located four blocks away. We walked to it every Sunday, weather permitting (and cold wasn't an excuse!). On those days when the weather was frightful, we took the car (or if it was REALLY bad, stayed home).

I am familiar with the Orthodox walking to synagogue, having seen it often in Silver Spring, Maryland.

Is there a distance beyond which walking to Synagogue on the Sabbath is impermissible? I realize that for some (the aged, for example) a long(ish) walk would be a hardship, but I assume that some arrangements are made in these extraordinary cases.