This Itinerary will detail each ride that I myself undertook going from Hanoi up to the northernmost areas, and back down all the way to Saigon. I did not include my adventures south of Saigon as that was a disaster and I literally have no advice except DON’T DO WHAT I DID!! You can watch my misadventures in the deep south here - https://youtu.be/yAHIgnM1Dz4
It is important to understand before you read the itinerary that each day can be a half a day or 2-3 days. It just depends on how fast you want to go.
If for example I have a day called ‘Hanoi to Ba Be Lake’, that does NOT mean that ride will take a full day. It may take half a day riding, it may take two or even three days.