完走(かんそう)running the race, staying the course

完走(かんそう)を目標(もくひょう)に初(はじ)めてマラソンに参加(さんか)した。

I participated in a marathon for the first time, with the goal of running the entire race. {running the race, staying the course}

マラソンでは、まずは完走(かんそう)を目指(めざ)す事(こと)にしましょう。

In the marathon, let's first aim for running the race to the end. {running the race, staying the course}

走(はし)るのが嫌(きら)いな僕(ぼく)は、フルマラソンを完走(かんそう)する事(こと)は出来(でき)ません。

As someone who hates running, I cannot stay the course of a full marathon. {running the race, staying the course}

一(いち)話(わ)あたり一(いち)時間(じかん)半(はん)かつ全(ぜん)二十(にじゅう)話(わ)の韓国(かんこく)ドラマを三(さん)週間(しゅうかん)かけて完走(かんそう)しました。

I completed watching a Korean drama, which has twenty episodes, each an hour and a half long, over the course of three weeks, staying the course. {running the race, staying the course}

完走(かんそう)するだけでも凄(すご)いのに、まさか新(しん)記録(きろく)を樹立(じゅりつ)するとは…！彼(かれ)はマラソンの神(かみ)だ！

Just completing the race is impressive enough, but establishing a new record...! He is the god of marathon! {running the race, staying the course}