The Centurion – UTVV 110 km route runs from the center of Ajdovščina, along the paved path along Hubelj River towards the southern wine-growing hills, where, climbing from Dolenje, passes the scenic church of Sv. Marjeta, climbs to the Planina plateau and joins the existing Emperor route at the Guerila estate. The descent to the village of Slap follows, and in a gentle ascent it crosses the village Lože (1st aid station), the picturesque village of Goče, and in a gentle descent, it reaches the village of Podraga. The first serious ascent to Socerb warms up the runners for the famous 1,000-meter climb to the top of Nanos (1,262 m), which awaits them after the stop in the village of Podnanos. From there, it descends again through the heart of Nanos, past the Abram Tourist Farm and the chapel above the avalanche, and down into the valley, where runners are greeted by a rich aid station on the Main Square in Vipava. After a short flat part, the second ascent of the race follows, to Kovk (961 m). Now it’s time for one of the most beautiful ridge trails in Slovenia, the crossing of Angelska gora and the ascent to Čaven (1242 m), followed by a picturesque crossing towards Mala gora and Kucelj (1237 m). The last “thousand-meter mountain” escorts the runners towards the beautiful church on the rock cliff, where the Vitovlje aid station is located. From here, the route crosses the valley and rejoins the Emperor route in the village of Preserje, on a scenic vineyard ridge. The last 20 km of the route runs along the beautiful Preserje-Planina ridge. Descending past the village of Planina, the trail ends in Ajdovščina along the paved path along the Hubelj river.

The UTVV ultramarathon challenge is set in the valley where one of the most important battles of the late Roman period, The Battle of the Frigidus, also called the Battle of the Frigid River, took place in 394. The battle was fought between 5 and 6 September 394 between the army of the Eastern Emperor Theodosius I and the army of the Western Roman ruler Eugenius. With Theodosius’ victory, the Roman Empire was united under one emperor for the last time in history. Also, the victory of Theodosius brought the final religious dominance of Christianity in Europe.