The Transcontinental Race (TCR) is an annual, self-supported, ultra-distance cycling race across Europe. It is one of the world's toughest ultra-endurance races. The route and distance varies for each edition between about 3,200 and 4,200 km, with the winners generally taking 7 to 10 days. Interest in the race grew rapidly from 30 people starting the first edition of the race in 2013 to over 1,000 people applying for a place in the fourth edition in 2016, 350 of whom were successful; since then, these numbers have been reasonably stable.

It is not a stage race, the clock never stops from the moment the riders leave the start to the moment that they reach the finish, so it is a long individual time trial. Riders must therefore strategically choose how much time to devote to riding, resting, and refuelling each day. Being self-supported or unsupported means that drafting is not allowed, receiving any form of support from other racers is not allowed, nor is it from friends or family; all food, accommodation, repairs, etc., must be purchased from commercial sources.