Previously this race, for eleven editions from 2002 to 2012, was called the Sentiero delle Grigne (43km / 3,200m D +), and was the race of the Skyrunner World Series circuit. ZacUP is the heir, shorter and less demanding, still keeping the spirit of the previous, so much to award the Trofeo Scaccabarozzi (the full name of the race was in fact the Trofeo Scaccabarozzi-Sentiero delle Grigne) to transit on the Grand Prize of mountain in the summit of the Grigna (2410 m).