Did the walk I looked at yesterday when driving up Onnut Road. I parked the truck a fair distance from Klong Prakhanong on Soi (Thai for lane) 17 and walked up to the bridge to get onto the pathway.
From the Soi 17 bridge looking west there are no signs of any more footpaths, see picture below. There might be something between Sukhumvit Road and the river and I hope to get over there soon.
This area seems to be the oldest part I have visited which makes sense as Bangkok would have developed outwards from the river. It seemed Buddhist rather than Moslem so the dog count went up along with their mess. Next to Wat Yang was a very old house that looked original. The small tiles on the roof are not usually seen on other than temples and palaces.