The Seminar to Prepare the Judges and Coaches of Marathon running was arranged successfully on 10th of May, 2017. With cohesion of ННБТСХ, МҮОХ, МХХМГХ and МУБИСХАТ, the Seminar to Prepare the Judges and Coaches of Marathon was arranged successfully for third time, to develop the marathon running sport and increase the amount of competitions held. The topics that were talked about this year were: -Specialties of marathon -Authorities of the judges -Professionalities -Naming new judges The organizers of the seminar were: -Department head of the ННБТСХ, A. Boldmaa -International Master, B. Enkhbaatar -Department head of МУБИСХАТ, G. Battsetseg -Department head of МУБИСХАТ, D. Bayrlah During the seminar, 10 people from МХХМГХ, 17 from ҮБТДС, 27 from Mon-Altius, 25 from Champ University, 7 from Sri-Chinmoi, 1 from Darkhan, 1 from Erdenet and 3 from МХАХ, 91 in total, received their certificate as professional judges.