From the Pyongyang Marathon website:
"For 2017 the race is a return course — rather than the 10km loop of previous years — with the route being run through the city centre. Runners will go past many of the iconic buildings, monuments, and streets of Pyongyang, before heading out into the countryside, just outside the urban centre, before running back again.
This new route — which is IAAF (International Association of Athletics Federations) bronze label certified — gives runners the chance to see more of the capital than in previous years, and also allows more interaction with people along the course, as it takes in more parts of the city than ever before.
All three amateur races — the 10km, half marathon, and full marathon — will start and finish inside Kim Il Sung Stadium (including a final lap of the stadium track). This means that everyone participating will get the chance to finish in front of a 50,000-strong capacity crowd of local Koreans who will be in attendance at the stadium.
The time limit for each race is as follows:
10km < 2 hours
Half Marathon < 2.5 hours
Full Marathon < 4.5 hours"