Alleycat race

Unsanctioned biking competition

An alleycat race is an unsanctioned bicycle race. Alley cats almost always take place in cities, and are often organized by bicycle messengers. The informality of the organization is matched by the emphasis on taking part, rather than simple competition. For instance, many alleycats present prizes for the last competitor to finish.

This keyword could refer to multiple things. Here are some suggestions: