I won't disappoint you Leslieray
it was a thin snake but quite long, it could be a juvenile. I've seen much bigger and fatter in another spot, one dropping herself down from a big rockwall on a huge flat bolder by the river, landing only a few meters from where I was standing, she was very curious too, and came sliding towards me, somehow I felt she wasn't dangerous for humans, just curious and that was mutual!
Afterwards I found out it was a Tiger Ratsnake (Spilotes pullatus) living from rodents.
I even made a video film from it.
This was a little one, about 1m long:
