1st edition of the Triathlon Challenge Thermaikos. Swim start from the beach of Nea Michaniona (below Retselis restaurant), finish at the central square of Nea Michaniona. 750m sea swim on a triangular course; 20km bike on the Michaniona–Angelochori road (2 loops of 10km, turnaround just before Angelochori port); 5km run (2 loops of 2.5km, turnaround at the junction with Epanomi–Nea Michaniona avenue). Time limit: 3 hours from the start. Open to athletes born in 2010 or earlier (16+). Minors need a signed consent form from a parent/guardian, handed in at bib pickup. An active TOE or recognised federation athlete card is required; otherwise a TOE Day Pass must be bought at hellastriathlon.gr/product/triathlon-pass/. Categories: Under-18 (16–17); Men/Women 18–29, 30–39, 40–49, 50–59, 60+. Finisher medal for all; medals for the top 3 men and women overall and per age category. Aid stations at the bike and run turnarounds. Electronic chip timing. Individual and relay (2–3 person team) entry. 10% discount for group registrations of 10+ entries. Race pack: technical t-shirt, swim cap, timing chip, bib number and finisher medal. Online registration closed on 30 September; if places remain, registration is possible at the race office on Saturday 10 October, 14:30–20:30, at the central square of Nea Michaniona, during bib pickup. Race pack pickup at the central square of Nea Michaniona: Saturday 10 October 14:30–20:30 and Sunday 11 October 07:00–08:00. Transition area open on Sunday 07:30–08:45 for bike and equipment check-in (all distances). MANDATORY technical briefing: Saturday 10 October at 18:30, central square of Nea Michaniona. Awards ceremony: Sunday 11 October at 13:00. Open Day on Saturday 10 October at the central square (free entry): sports activities for children and adults with North Academy 16:30–18:15; cultural events ("Sta dichtya tis paradosis") and MAKVEL pasta party from 19:00. Under the auspices of the Hellenic Triathlon Federation (TOE) and the Region of Central Macedonia. Contact: info@triathlonchallenge.gr | +30 2310 442104