18th consecutive edition, organized by E.P.O.S. Fyli with the support of the Municipality of Fyli. Mountain half marathon in the forest of Western Parnitha that was untouched by the 2023 fire: mostly mountain trails, past streams and springs and on forest roads, passing beside the characteristic «Arma» cliff that gives the race its name. The courses are about 4/5 trails and 1/5 forest roads and are circular. Start and finish: Kria Pigi Fylis (Piges Archaias Fylis), before the ancient Fyli fortress, on the Fyli – Dervenochoria provincial road (turn right). Access: from Attiki Odos exit 6 (Fyli – Ano Liosia) follow Leoforos Fylis to Fyli village, at the «Eligmos» junction keep left towards Dervenochoria, after about 7 km turn right just after the wooden forestry hut and continue 500 m to Piges Fylis (about 15 km from the Attiki Odos exit). Aid stations: Apostolis trail exit (4.7 km), Gkoura spring (9.7 km), Mavrorema exit (12.7 km), Rachi Karamanli (17.4 km), Bikeza spring (18.9 km), with water, juices or isotonic drinks, electrolytes and sugar cubes; volunteers and Red Cross are on course. Elimination point: runners must reach the 4th aid station (Rachi Karamanli, 17.4 km) within 2:15 hours of the start. Finishers after the time limit are recorded as DNF; they may continue at their own risk and must hand their timing chip to the secretariat. Open to adult runners in good physical condition; minors need the consent of a parent or guardian. Runners should study the course map and elevation profile, have had a recent medical check (no medical certificate is requested), check the weather forecast the day before and carry mountain-running gear. Maximum 500 participants in total for both races (21 km and 11 km). Registration is valid only after payment by card within 2 days of applying; a confirmation email follows. Optional T-shirt +€10, for registrations until Tuesday 20/10/2026 14:00. Race packet pickup (bib, timing chip, T-shirt): E.P.O.S. Fyli office on Friday 23/10/2026 13:00–21:00 and Saturday 24/10/2026 10:00–14:00 with ID card; otherwise at the start (Piges Fylis) on race day at 07:30. Awards: cups to the top 3 men and women overall per course; participation souvenirs and medals for all runners. Awards ceremony at 12:30 at the open-air theatre of Piges Archaias Fylis. Results are also published by age category – Men: up to 30, 31-44, 45-55, over 56; Women: up to 40, 41-50, over 50. The race takes place regardless of weather; the entry fee is refunded only if the race is cancelled, not if it is postponed. Race director: Drosos Trapezaris, tel. 6944694424.