1) Cycle sport 
Latin, meaning: bold 
special touring events with checkpoints.
[cycling] Audax is a cycling sport in which participants attempt to cycle long distances within a pre-defined time limit. Audax is a non-competitive sport: success in an event is measured by its completion. Audax has its origins in Italian endurance sports of the late nineteenth century, and the rules were formalised in France in the early ...
sometimes uses as a synonym for randonneur. More formally, audax cycling is when a group rides a randonnee in unison at a steady pace of about 22 kph.
sometimes uses as a synonym for randonneur. More formally, audax cycling 
bold