Standard races are held over 10, 25, 50 and
100 miles. Beyond this the measure changes to trying to cover the most miles
in a set time. Events are then held over 12 and even 24 hours. Events are
also held over other distances.
A good way to start is by entering local club
events. 10 and 25 mile races are generally held on mid week evenings during
the summer months.
With a bit more experience Open events can be
attempted. These have to be entered in advance, at least 2 weeks before the
event. They are listed in the Cycling Time Trials handbook or on their
website.