Event· Lisboa
Alcobertas Backyard Ultra 2027
**Alcobertas Backyard Ultra 2027** is an ultramarathon event held in Alcobertas, Portugal, following the "Backyard Ultra" format, in which runners must complete a 6.7 km (4.167 mile) loop every hour—starting exactly on the hour each time—until only one runner remains, who must finish one final loop to win. The event tests endurance, pacing, and mental resilience, as there is no fixed finish distan