Mo Farah is set to retire from the track at next year's IAAF World Championships in London - and Berlin 2018 could be the place where he starts his new international career.
The British star is back home in Oregon with his family after his amazing exploits in Rio where he became only the second man to complete the Olympic 5000m/10,000m double, achieving his aim to win two more Olympic gold medals so his four children can have one each.
Once more he reaffirmed that London will see him step off the track for good, telling the BBC: "In 2017, I'd like to end it on the track and then we'll see what we can do in the marathon."
Cue the next European Athletics Championships in Berlin 2018, and the significance the event has already played in Farah's distinguished career.
When he looks back on his time of golden glory on the track, it was Barcelona in 2010 where it all began outdoors for him.
Those Europeans six years ago was the moment Farah really introduced himself to the world - winning the long-distance double. Since then, he has been the dominating force in the events, repeating that European double in Zurich in 2014 among his many exploits.
If the road awaits, Berlin will provide the perfect place for him to launch his championship marathon career.
Now 33, his track achievements are beyond his wildest dreams and the 26.2-miles will provide an interesting new test.
He has nothing to prove and over the half-marathon has showed regularly how well he can run on the roads, holding the British record of 59:32 and next month aiming to win the Great North Run for a third time in a row.
A year ago when he triumphed in that half marathon, he ran 59:22 but as the course is slightly downhill it does not count for record purposes.
It was back in 2014 when Farah made his full marathon debut when he was eighth in London in 2:08.21 and as he said: "It's the challenge. I want to know I can run a great marathon as well as achieve medals on the track."
Indeed, there seems even more exciting times could be ahead for him.