Make your way to On Nut BTS and leave by exit 3. Walk about 20 meters, then turn left on to Sukhumvit Soi 81.

Walk about 500 meters down Soi 81. The run site is where all the covered food stalls are, just over the khlong bridge on the left hand side.

Bring a torch !

Google Maps Link: https://goo.gl/maps/Z5NRKGFLzR62