The record number of runners competes in the only intercontinental marathon on Sunday.
Vodafone 40th Istanbul Marathon started on the Asian side of the Istambul Bridge on July 15, already known as the Bosphorus Bridge.
The target line is located on the historic Sultanahmet Square on the European side of the city.
This year's theme is "Start Istanbul for a Healthy Future".
The marathon was attended by about 30,000 professional runners from more than 100 countries.
In addition, approximately 100,000 people were expected in the 8-kilometer transcontinental Istanbul Marathon Fun Run.
The event had a 42 kilometer (26 miles) marathon, and three other races on the 15km, 10km and 8km routes. It also included a race for participants with wheelchairs.
About 5,000 runners – more than half the aliens – competed in a 42-mile marathon.
The top five countries that send runners are Russia, Germany, Ukraine, the United Kingdom and France.
Fifty-five elite runners from Turkey, Kenya, Ethiopia, Azerbaijan, France, Bahrain and Morocco participated in the marathon.
Compared to the previous years, the number of foreign runners in the marathon doubled.
The Istanbul Marathon is among the 17 marathons in Europe and 38 marathons in the world.
Vodafone is the main sponsor of the race organized by Spor Istanbul, a subsidiary of Metropolitan Istanbul.
After the start of the transcontinental marathon, Turkish Youth and Sports Minister Mehmet Muharrem Kasapoglu told Anadolu Agency "Istanbul has become a Marathon Mark, like New York, Boston and Tokyo."
"By joining the continent, we will prove the unique power of sport," Kasapoglu said.
Mayor of Metropolitan Mevlut Uysal also said: "This marathon can turn into the best marathon in the world by improving this organization and is now among the top 15 marathons in the world."
Bearing in mind that last year around 100,000 people went to the marathon, Uysal said the number of participants will increase this year.
Last year, French runner Abraham Kiprotich won the men's category and Ken Ruth Chepngetich's women's category.
For more information, visit www.maraton.istanbul and follow #runistanbul and # run4health hashtags on Twitter.