You can plot out routes on this site and then export the GPX files to your Zumo. That's what I do with all my trips.
Just click on your profile name (upper right corner). Then click maps. Then click new map.
You can click on the map to drop a waypoint marker. (click, then select the 1 marker in the upper left). The next one will be 2. And so on. You can drag them. You can click on the route to insert one.
When you're done you can click the "GPX" button to download the GPX route that you can put onto your garmin.
I'll write up some easy instructions in the next few days.
In the mean time, here's more info than you probably want about what we've built here:
Miles By Motorcycle originally grew out of my desire to have a better place for my friends and I to discuss, plan, and document our motorcycle travels.
There's quite a bit of of knowledge involved in travelling long distance by motorcycle. There are bikes to consider for differents kinds of trips. There are awesome roads hidden between seemingly endless superslab and conjested towns. There are hidden gem places only locals know. There are shops, restaurants, cool old ...Read More