Nice walk, with good views of the Cheron. While you walk the same trail to go and come-back, the views are completely different. There are ruins many Borie, and the “borie de Pons” was the most complete I’ve seen.
More photos here.
Less then two hours and seven kilometers and very easy all the way.
The RandOxygene guide is here and no real mistakes. Not the start of the trail does not have yellow or GR marks, they come after about 500 meters.