We hold this event in the month of October. We recall the term gau lana (night work), in the memory of all those who had to work in difficult circumstances as smugglers of contraband goods.
The competitors in this are experienced runners of both sexes. There are two competitions. The first is called gaueko lanak, a 9.5 km night race along local paths and trails, with a 600 metre elevation difference. The second is called UKL maratoi erdia, a fully renewed 22 km race with a 1,200 metre elevation difference. As usual, the organisers offer a tasting of pintxo snacks, bacon and lunch, etc.