shadowfang keepFollow

how do i get there?

usually the quest itself says what region it's in. Then you can use the nifty new layout of allakhazam to look for a region map. In this case it's under places -> eastern kingdoms -> outdoor -> silverpine forest.

http://wow.allakhazam.com/Im/image/full?id=38984

Check out the map, SFK is above pyrewood village.