My long run is an odd one. I don't exactly go out and back, but neither is it a loop.
The first few miles I don't retrace, then I go up on the downs from the race course at Lewes to Jack and Jill windmills and back again, the final part of the run is different. I take small loops to my right going up and down hills both on the way out and on the way back so I don't exactly retrace steps, however I do follow the general path. This is just to include as many hills in the run as I can.
Most of my planned runs follow this sort of general pattern. I criss cross, lolipop (I like that mmm yes lolipop runs, has a ring to it
), zig-zag my way on my runs.
I often find myself retracing my steps on a new run that I haven't done before as it's quite easy to go wrong. 