A few years ago I went to Germany with a friend and 'did' the Trier to Koblenz trip along the river Moselle. Great stuff.
To travel along the river by car is easy, good roads, plenty of parking and excellent vantage points with breathtaking views.
Now on a bicycle that is where the real excitement comes in. First of all you can follow the Moselle in either direction by a specially for the tourist created bike-road called “Mosel-rad-pfad”. It is safe and takes you along the shores of the river as well as through the vineyards and small villages. When you follow this bike-road there is hardly any elevation to speak of, so you can also enjoy it as a novice bike-rider or (as I did once) with the kids! The distances between the towns and villages are minimal so any amount of kilometers a day can be done without any hardship. There are plenty of places where you can eat along the way, from simple food stalls with ‘Bratwurst” to luxurious Michelin star restaurants. The best about being on a bicycle is that you can get off and sit on one of the many terraces and enjoy a glass of the local wine or a cool local draught beer with your food! There is no lack of accommodation to choose from, camping sites, youth hostels (Jugendherbergen), B&B (Zimmer frei), low cost hotels (Pension) to first class star-rated hotels. Apart from camping sites all accommodation come with a typical German breakfast (Fruhstuck) of magnitude. German people still believe in a hearty breakfast and if you’re wise take your time over it, it’ll set you up for the rest of the day!
Accommodation is unbelievably varied, I for instance have stayed in the YH in Koblenz which is situated smack in the middle of the largest fortress in Europe with a view five star hotels can’t afford! In one of the B&B’s I was given a room that was in the olden days used as a ball room! A lot of B&B’s are run by people that own vineyards and they are more than willing to let you sample their wines in their cellars, what a way to go……
Finally, I have once spent an unforgettable six weeks in July/August with a girlfriend and her seven year old daughter, biking from Koblenz to Trier and back at a very leisurely pace and in that time we had one day of rain. It was on the last day of our journey, luck I suppose……..