Above is what the Out and Back (Reverse) button looks like on the RoadBikeRides.com site.
An out & back is when you start in one place, route to a turn-around point, and then return to your starting position. RoadBikeRides.com makes this easy to plot as all you need to do is plot a course to your turn-around point and then click the 'Out & Back' button. We'll re-plot the return points for you and you'll see your distance doubled!