You probably heard of
#OsmAnd, the swiss knife map app that uses
#OpenStreetMap data, but do you know that there's a web-based interface, too?
Check out
https://osmand.net/map, and plan your trips with routing, and various map rendering options, while doing so in the comfort of your desktop browser.
It even includes weather forecasts, if you're trying to avoid getting wet for your weekend ride.
You don't even need to register for an
#OsmAnd, or
#OpenStreetMap account to use it.