The new race of 2021. A ring of 15 km and 1160 mD+ with departure and arrival from Piazza Pian de’ Valli in Terminillo. The route leads you to admire all the slopes of Monte Terminillo, along a first section in common with the K42, and then going around the north wall with a suggestive traverse reaching the Sebastiani refuge. From here, go up the normal route to the summit of Mount Terminillo at 2217 m, then go along the sharp ridge that leads to Rif. Rinaldi and plunge headlong into the dizzying descent that leads back to Pian de’ Valli.