19th Alonissos Challenge - flagship 20km road race. Route: Patitiri port heading northeast toward Gerakas, Chrysi Milia and Kokkinokastro, then via the island's main road west and up to Old Alonissos (Chora), descending to Megalos Mourtias beach before returning to the finish at Patitiri. Open to ages 18+ with a recent medical check-up. Aid stations every 2.5-3km plus the finish (water + isotonic). Time limit: 3 hours; runners beyond that continue at their own risk. Kit includes bib, timing chip, T-shirt, backpack, wristband, medal, ferry ticket discounts, and entry to the pre-race pasta party. Awards to the top 3 men and women overall. Bib pickup: Sat 5/9 10:00-19:00 and Sun 6/9 from 07:00 in Patitiri (exact point TBA). Cancellations/refunds only by email to info@myrace.gr by Fri 10 Aug 2026 23:59. The weekend also includes swim-only races at Chrysi Milia on Saturday - Golden & Silver Swim Experience, Junior Swim Challenge, and the Golden Mile Swim Experience (1 mile open water, ages 12+) - check the official site for details.