7th edition of the Mastichathlon, co-organized with the Municipality of Chios and the Region of North Aegean. Format: 5km run, 20km bike, 2.5km run. Start and finish at the Unknown Sailor statue on the Vrontados waterfront. Includes race bib, electronic timing, commemorative t-shirt, finisher medal, aid stations (water, isotonic drinks, fruit), medical coverage, photo coverage, and 50% ferry fare reduction. Bib pickup at Chios Town Hall: Friday 11/09, 17:00-21:00, and Saturday 12/09, 10:00-15:00. Race day: check-in 07:15-08:00, start 08:30, awards 10:30, followed by a party at the finish area.