We will take part in the marathon.

He gave up taking part in the marathon on account of his cold.

Nobody fell behind in the marathon race.

Sam doesn't have the stamina to finish a marathon.

He timed her in the marathon race.

That sports are gaining in popularity all over the world is evidenced by the sports news in the papers, by the many sports equipment stores, and by the number of runners who participate in marathons or other races.