[5] In 1987, a marathon was held over the Rama IX Bridge in honor of the king's 60th birthday.

[4] Called the Royal Marathon, it helped launch a running boom in Thailand.

[4][6] In 2013, the course of the half marathon was changed at the last minute because of concurrent Bangkok street protests which reduced the distance of the half marathon from 21.1 km (13.1 miles) to 19.7 km (12.2 miles).

[7] The 2020-2021 edition of the race was postponed to 2021 due to the coronavirus pandemic, before registration opened.

The marathon starts and finishes in front of The Royal Grand Palace at Sanam Chai Road.