The phrase "a marathon at the" is not complete and lacks context, but it is grammatically correct and can be used in written English.
You can use it when referring to a specific location or event related to a marathon, but additional information is needed for clarity.
Example: "I signed up for a marathon at the local park this weekend."
Alternatives: "a marathon in the" or "a marathon on the".
But when you bomb a marathon, at the finishing line, you can guarantee certain marathon-specific things.
"I have spoken in Sydney, Auckland and Miami, raced across the Gobi desert and done a marathon at the North Pole.
Hayes was beaten twice in this country by Pietri, and both were defeated at a marathon at the Polo Grounds by a taxidriver, the famous Henri St .Yves, of Paris.
"Certainly, it has been a sprint and a marathon at the same time this year," said Representative Chris Van Hollen of Maryland, chairman of the Democratic Congressional Campaign Committee.
I'm training for a marathon at the moment and, to be honest, I'm more worried about whether I'll get in enough long runs than I am about runner's face.
And so it has come to pass each year for the past six that Dante's "Inferno," Part I of his "Divine Comedy," in which Virgil leads the poet through the region of damnation, has been read through the night and into Good Friday in a marathon at the Poets' Corner of the Cathedral of St. John the Divine.
Gael Monfils is a set up on Karol Beck and Nicolas Mahut and John Isner are locked in a marathon at 5-5 in the final set.
Drooker recalled his first thoughts after hearing the news from Boston: "A bomb at a marathon, right at the finish line of a festive occasion — it seemed almost like a mixed metaphor, incongruous and absurd.
And instead of being exhilarated after crossing the finish line at a half marathon at the beach, on a gorgeous, sunny day, two weeks ago, I was disappointed with my performance and unusually moody.
The great Bach interpreter Sir John Eliot Gardiner marked Easter Monday, in 2013, by organizing a Bach Marathon at the Royal Albert Hall: nine hours, a hundred musicians, an audience of two thousand, a live broadcast on BBC3.
nytimes.com/thelede CITY ROOM: A CODA TO A 9/11 CONTROVERSY Karlheinz Stockhausen's "Stimmung" will culminate a music marathon at the World Financial Center in June.
