For years while living in the US I looked for people to cycle tour with. It just wasn't the "thing-to-do". I would say that I cycled on my own 99% of the time. People thought I was crazy for riding such long distances and carrying all that crap. Those that did cycle tour were few and far between. Of course, cycling is now hugely popular and it seems that everyone & his monkey's uncle is pedaling around.
Why not just do audaxes? Good question. A surprising thing happened after all those years of cycling around by myself; now that I've got loads of groups to cycle with... I prefer it on my own. Weird, but true. Don't misunderstand me, I enjoy going out with others and seldom turn down a group ride, but getting out on my own holds a special charm.
What's a Solitaire?
My working definition; "Solitaires" are solo rides ranging from 100 kms to 300 kms. I've designated eight distances that qualify as "Solitaires" with the minimum distance is L'audacieux at 100 kilometers (62.13 miles; a metric century...) and the longest Le Meilleur at 300 kms. Then there's a bunch of other silly names for various distances in between I've created just for fun.
The main consideration is that all of these rides were solitary rides. Any rides made with groups or other individual riders are excluded regardless of the distances. And that's all that's to it.