Ultra Trail El Rincón is a mountain trail series held in Castielfabib, within the Rincón de Ademuz region of Valencia, Spain. It typically takes place on a late September weekend and features four race distances: 11 km, 33.7 km, 104.2 km, and 172.1 km. The longest race is known as Las 100 Millas Valencianas, establishing the event's hundred-mile status alongside shorter options for a focused mountain race. These races are classified as mountain events with UTMB Index recognition, drawing trail runners seeking both regional contests and index-qualifying performances.
The courses traverse the trails surrounding Rincón de Ademuz, a small inland area of the Valencian Community, distinct from a metropolitan backdrop. The 33.7 km race provides a clear indication of the terrain, featuring a 1,110-meter climb, with 135 finishers recorded in one edition and a winning time of 2:51:09. Entry has been available for all four distances, offering early-bird reductions and lower fees for affiliated athletes. The organizers have also been transparent about the practicalities of hosting the race, including a past cancellation due to insufficient personnel and financial means to conduct the event appropriately.