Round-trip courses. Looking at route before you set off

I regularly use the Garmin 1030 to plan round trip courses from my home just setting the mileage (say 50 miles) and letting the Garmin plan 3 alternate routes.   What Id like to be able to do is view these routes on a PC screen before I decide which one to choose.   It very painstaking trying to do this on the small Garmin screen. Is anyone aware of a way of doing this?

Obviously once I've finished and recorded the route its there to view in Garmin Connect but Id like the ability to do this on a large screen BEFORE i set off.