"It was something I wanted to do when I turned 40."
Lysaght said the weather was wet, cold and windy for the race, but he was still happy with his time considering the conditions.
Although he is still recovering from the 42km run, he is planning on running the Rotorua Marathon next Saturday - his home event.
"I will be a bit sore from Boston but will still be doing my best," he said. "My first marathon was Rotorua back in 2004 and this will be my 12th one. My goal is to get to 15 and get into the survivors club."
He said he had never backed up from a marathon in such a short period before, but was aiming to crack three hours again next weekend.
"My legs are starting to feel a bit better ... and I still want to get under three hours in Rotorua."
Lysaght spent about 10 days in the United States with his wife Jeanene and visited New York as well as Boston. He said going for a run in Central Park in New York was a highlight but the Boston Marathon itself was extraordinary.
"It was all pretty much a highlight but turning into that last straight when you know you only have a few 100m to go is pretty awesome.
"And getting to the top of heartbreak hill. It is a series of four hills and they are not long but they take it out of you."
Lysaght finished as the third best Kiwi at Boston this year and 325th overall out of about 30,000 participants.
Lysaght said a clubmate at Lake City had told him in 2013, after the Rotorua Marathon, if he had shaved his beard off he could have taken a minute off his time.
So in 2014, he shaved his head and beard and ended up running two minutes faster.
"So now I get my head shaved before any big race," he said.
He did the same for the Boston Marathon.
