Two-day, 47 km crossing of the National Resistance Trail: Stromi – Mavrolithari – Kastriotissa – Katavothra Oitis – Agio Pnevma hut – Prionia Chodrogianni – Plakoto – Gorgopotamos. Part of the celebrations for the 84th anniversary of the blowing up of the Gorgopotamos bridge, dedicated to everyone who fought for the country's freedom. Along the route there are historical reference points, information stops and short readings of testimonies, with guides informing participants. Trail research, historical documentation, mapping and waymarking by civil engineer Nikos D. Fousekis. Organised with the Region of Central Greece, the Municipalities of Lamia and Delphi and the Lamia Forest Friends Club. Only for mountaineering clubs and experienced hikers, accompanied by mountain guides. Saturday 14/11: meet 06:00 at the Panhellenic Exhibition car park in Lamia or in Amfissa at Ethnikis Antistaseos square (opposite ACS Courier); start 07:45 from Stromi square; 27 km, 9-11 h walking, min altitude 809 m, max 1,642 m, +1,243 m. Night outdoors at the Agio Pnevma hut (60 m² wooden hut and 60 m² shelter); food and water are provided; bring a tent, sleeping bag and mat. Overnight gear can be carried to the overnight point and the finish, where it is handed back. Sunday 15/11: Agio Pnevma hut – Paliopriona – Makria Rachi – Fakitsa – Plakoto – Gorgopotamos, 20 km, 6-7 h, min altitude 55 m, max 1,598 m, +455 m; arrival in Gorgopotamos around 16:00, then buses back to Lamia and Amfissa. Gear: thermal underwear, fleece, waterproof jacket, gloves, hat, boots, poles, head torch with spare batteries, whistle, at least 1 L of water, tent, sleeping bag and mat, snacks, knife, first-aid kit. Register through the Google Form; info 6937437750 (Kostas Kakavas). Route on Wikiloc: https://el.wikiloc.com/oreibasia-diadromes/diaskhise-monopatiou-ethnikes-antistases-2026-288119639. Participation terms: ages 18+ (minors only with a guardian, after telling the organisers); by taking part you accept the programme and take personal responsibility; you must have studied the route, be fit and not be afraid of heights; no pets, no drones or speakers; stay with the group. The organisers are a non-profit and accept no liability.