The 36-year-old is the third highest capped Scotsman of all time, having worn the thistle 105 times since making his Test debut back in 2004.
Now out of the frame with Scotland and playing a role on the bench at a full-strength Glasgow, Lamont feels the time is right for him to step aside and allow the younger guys to come through at Scotstoun.
"Unless they beg me to stay another year, I think I'm done," he said.
"I have had a great run and enjoyed every single moment but it is time to step aside. I am not going to flog a dead horse, although some might say I've been two years dead anyway!
"I love the sport, I love being in it and I love the guys I work with. But I just don't have the gas anymore. I can't get through those holes I see. I can still truck it up a distance, but there is definitely a blunting of the axe."