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Decathlon International Prince's Island Half Marathon

Adalar, Marmara Region, Turkey

calendar_today 27 Sep, 2026

directions_run Running

sell $55.00 – $65.00

About the Event

Atatürk Square serves as the heart of our vibrant event center, situated directly on the pier. Here, all participants will gather to meet fellow runners and enjoy brand stands, a lively stage for entertainment, and warming-up activities before the race begins.
Once athletes have stretched their legs and prepared with warm-ups, they'll make their way to Çınar Square, located in front of the Islands Cultural Association. This is where the starting line awaits, setting off an exciting journey through scenic routes that showcase the area's unique charm.
Upon crossing the finish line, runners will be greeted by a catering corridor offering refreshments and sustenance for those who have completed their race. The atmosphere here is one of celebration and camaraderie as participants unwind and share stories from the day’s run.

Races Offered

10K (full island)

Sep 27, 2026

straighten

Distance — 10K

terrain

Type — Running

timer

89 days remaining

sell

€65.00

5K (half island)

Sep 27, 2026

straighten

Distance — 5K

terrain

Type — Running

timer

89 days remaining

sell

€55.00

Half-marathon (2x island)

Sep 27, 2026

straighten

Distance — 21.1K

terrain

Type — Running

timer

89 days remaining

sell

€65.00

Weather History

These values represent the 3-year monthly averages for September in Adalar.

thermostat Temperature

19.1° / 26.7°

wb_sunny Feels like

19.1° / 25.6°

light_mode Avg sunshine hours

10h 43m

water_drop Avg rainfall

1.7 mm

ac_unit Avg snowfall

—

air Avg wind speed

13.4 km/h (Gentle breeze)

opacity Sweat loss rate

High

terrain Course conditions

Hard and dry surface

sunny Max UV Index

Moderate (5.0)

humidity_mid Humidity

69.7%

wb_twilight Sunrise

06:44

nightlight Sunset

19:11

About Adalar

Learn more about the host city, Adalar.

The Princes' Islands, officially just Adalar ; alternatively the Princes' Archipelago; is an archipelago of nine islands off the coast of Istanbul, Turkey, in the Sea of Marmara. These constitute the municipality and district of Adalar within Istanbul Province. With a total land area of 11 km2 (4.2 sq mi), it is the fifth smallest district in Istanbul and, with a permanent population of 16,690 (2022), by far the least populous district in Istanbul.