I've run five marathons to date. First was in April 2014 just under the 4 hour mark. Due to conditions and decisions I made on the day (heat/crowded courses) for the next three they have been similar times.
Ran Berlin this year in 3h35. So I would say this is more representative of where I am now. Half marathon this year time is 1h37.
Been running for around 5 years now, 40 to 44 age group.