I see comments describing 100 km as measely ....... a bit off putting.
I hope I've never been guilty of describing 100km as "measly". 100km was my very first Audax distance.
However I think that "true" Audax starts at 200km, based on points allocation (I may have interpreted this incorrectly).
I see the 200km = 2 points (100km = zero points) as a way to move Audax out of "Charity Ride" distances and into "Long Distance".
For everyone on an Audax, other than about 10 people in the country, there will always be someone quicker on the ride, someone tougher, someone who just seems to make your own efforts seem rather trivial. That's irrelevant.
Audax is about you, competing with your own limits, not someone else's.Some riders are so quick that riding a 600 isn't actually a challenge, it's just two longish day rides. I can admire their fitness but there's no courage to admire.
To be honest I'm more impressed by riders who JUST manage to finish in time, who have battled against the clock all the way around, not slept, and gone way beyond their limits.
They may not be amazing athletes but they demonstrate something more valuable.
If 100km is your limit and you battle to ride 101km to the finish then chapeau to you.
Just do what you can, and then do a bit more, to surprise yourself.
It can be a miserable experience at the time but Audax is a sport best enjoyed in retrospect.