Sometimes visitors enjoying a Guided Tour of Qatar, will decide to remain at their last coach stop, rather than returning directly to the Cruise Ship Terminal. Some people enjoy walking, and elect to return to port on foot.
To help you decide if there is enough time to walk back to your ship, I have walked the three main last stop locations back to port for you. I consider myself to be an average walker, not too fast, not too slow. So this should be a decent estimate for you.