marathon-; and related entries ending in -athon, -thon

(Greek: derived from an ancient villiage in Greece, northeast of Athens; as a result of an important Greek victory over the Persians in 490 B.C.)

walkathon (s) (noun), walkathons (pl)
A long-distance walk, either as a race to test endurance or to raise funds for a charity or for a special cause: Some walkathons include supporters or sponsors who pledge to donate sums of money for a specific contestant or team of walkers for each mile or for the total number of miles completed.