Koumaria Ultra: 75 km / 4,500 m D+, 4 ITRA points / UTMB Index 100K, time limit 17 hours. Cut-offs: Romanos (27 km) 11:15, Krystallovrysi (50 km, main station & drop bag) 16:30, Stavros (65.5 km) 20:00, finish 22:00. Entry requirement (finishes since 1 January 2025, with ITRA profile or official results in the registration form): one race of 3+ ITRA points or UTMB Index 50K/100K, or two races of 2+ ITRA points each. Age 18+. Drop bag service to Krystallovrysi (50 km), max 30 L, handed in Friday or Saturday by 04:30. Mandatory kit: charged mobile phone with the organizer's emergency number, headlamp with spare batteries or second headlamp, waterproof breathable jacket, survival blanket, whistle, at least 1 L of water, own food, GPX track on watch or phone; 'Heavy Winter' protocol adds thermal layers, long tights, gloves, hat/buff and waterproof overtrousers. 6th Koumaria Trail Series, 27–28 February 2027, Patras. Start, finish and race office at the historic Achaia Clauss winery in Petroto, Patras, with free parking inside the winery. Programme: Fri 26/2 race office 15:00–20:00 and Ultra briefing at 19:00 (in person and live-streamed, with an English summary). Sat 27/2: Koumaria Ultra 75 km at 05:00 (new this year), Achaia Clauss Kids Race 1 km at 12:30, Floga Race 4 km at 14:00. Sun 28/2: Koumaria Marathon 40.5 km at 07:30, Koumaria Trail Race 22 km at 09:30, Omplos Hills 12 km at 10:00. The Back to Back Challenge of previous years has been discontinued. Registration online only, until Sunday 14 February 2027 or earlier if a race fills up; a registration is valid only once paid. Cancellations (refund minus bank fees), bib transfers and race changes only until 14 February 2027. Bib pickup only at the race office with ID or passport, up to 30 minutes before each start. A recent medical check is required for all participants. Included: bib and electronic timing, souvenir gift, finisher medal, aid stations (solid and liquid) and a recovery meal at the finish, rescue teams (EOD, EOPYD, SEPYNA etc.), doctor and ambulance, free bag storage at Achaia Clauss. Eco-policy: no disposable cups at aid stations, bring your own flask/soft cup. Poles optional on all courses. In case of extreme weather the organizer may change start times, use lower-altitude Plan B routes, enforce the 'Heavy Winter' kit protocol or postpone/cancel; if cancelled due to force majeure there is no refund, entries move free of charge to 2028. Awards (Ultra, Marathon, Trail Race, Omplos Hills): top 3 men and women overall and in age groups 18–39, 40–49 and 50+ (overall winners excluded from age groups; an age group needs at least 6 starters). Elite runners (ITRA/UTMB index above 730 men / 620 women) race the 75, 40.5 and 22 km for free by contacting the organizer by 14 February 2027. Routes, elevation profiles, GPX files, aid station tables and cut-offs at diava.gr. Contact: info@diava.gr, 6973903923.