Take a Silom Line to Talad Phlu (on west side of the Chao Phraya River).  Leave Talad Phlu station by Exit 4 above Rachadapisek Rd. Follow the white chalk arrows north along Ratchadapisek (inner ring road/ also called Charun Sanitwong Rd.) towards the overpass at Thoet Thai road.  Cross at the traffic lights and continue 50 meters to the run site under the bridge over Khlong Bangkok Yai. 

Take the expressway to Khlong Toey. Head west on Rama III Road. Cross the Chao Phaya River on Rama III Bridge; continue to the overhead green road-sign “Tha Phra”, a major road junction with traffic lights; pass below the BTS elevated rail line and Ratchapreuk flyover and filter left.  Do not take the ramp leading to the Thoet Thai Rd. flyover and the Khlong Bangkok Yai bridge.  Cross at the traffic lights and continue 50 meters to the run site under the bridge over Khlong Bangkok Yai.  There is very limited parking. 

For more info on Talat Phlu  BTS station, click here.