Circular trail race (actual distance: 22.2km) starting and finishing at Vavdos primary school (alt. 753m), Chalkidiki — 'the balcony of Chalkidiki'. Terrain varies: oak forest floor, rocky, dirt road, cliff-side, grassy. +1220m elevation gain. Highest point: 950m (Prophet Elias chapel). Registration desk opens 07:15; runners should arrive by 08:30 and receive an energy gel with their bib. Route: From the school yard through the village alleys, uphill to Platanos (one of 69 protected natural monuments in Greece), right onto the 'Karodromo' path. At ~1km the 'Eirini' trail begins heading south (first 2.5km shared with 6K route). After the split the 21K enters oak forest. Aid Station 1 at km 5.9 (alt. 687m). Then into the 'Saroni' ravine (lowest point km 7.6, alt. 512m). At km 8 the ancient 'Koinopraxia' trail — roped rocky crossing at km 8.3 with views of Kassandra. Aid Station 2 at km 9.1 (alt. 602m). Through the 'Vourtoupara' and 'Balsamiko' ravines with running water and old terracing. Aid Station 3 at km 13.7 (alt. 630m). Into oak forest with views of the Anthemountas valley and Thermaic Gulf. Aid Station 4 at km 17.7 (alt. 787m). Gradual ascent to ~km 20, then the 'Dasologue' trail — 500m steep climb to the summit (950m, views of Paggaio, Falakro, Olympus, Kassandra, Sithonia, Athos and more). Descent through village alleys to the finish. Aid stations (water, isotonic, nuts, chocolate, fruit, homemade village pies): km 5.9, km 9.1, km 13.7, km 17.7. Cutoffs: Aid Station 1 in 1h15; Aid Station 2 in 2h00; Aid Station 3 in 3h15; Aid Station 4 in 4h15; finish in 5h00. Categories: Men 18–49, Men 50+; Women 18–49, Women 50+. Post-race: pasta meal by Melissa for all finishers.