(CNN) - Mitt Romney compared his presidential run to the highs and lows of a roller coaster ride - and, like all rides, it must come to an end.
"We were on a roller coaster, exciting and thrilling ups and downs, but the ride ends and then you get off," he said in an interview with Fox News.
"And it's not like, oh, can't we be on a roller coaster the rest of our life? No, that ride's over," he added.
Romney was the Republican presidential nominee in 2012, and was defeated by President Barack Obama.
It was Romney’s second bid for the White House.
He is a former governor of Massachusetts and also mounted a U.S. Senate challenge to Edward Kennedy in 1994, but lost.
Life off of the campaign trail is "different," he said - and no doubt less stressful and slower paced.
His wife, Ann, was along for the ride and described her husband's bid for office as a type of civic service similar to his service within the Mormon church.
Life since November, she said, has been "an adjustment but it's one that I think we did well."
"It's like we came and stepped forward to serve and the other part of it was an amazing thing, and it was really quite a lot of energy and a lot of passion and a lot of people around us, and all of a sudden it was nothing," she said, seated alongside her husband.
"But the good news is fortunately we like each other."
- CNN's Gregory Wallace contributed to this report