How far do I have to ride my road or MTB to say I have ridden an "epic" ride?
Do I measure in miles/km or time in the saddle? Is every century epic? Can a 10 mile ride be epic?
Perhaps the definition is related to pain, suffering and self-punishment.
Maybe a string of mechanicals along the way plays a part. Does a flat tire count? or two or three?
Solo or with buddies?
How about a long ride on an unknown road or trail?