Related Clues:

• Long
• Battle site where the Athenians routed the Persians
• Part of an ironman competition
• Lasting event?
• Race
• Olympic event
• "--- Man" (Hoffman flick)
• Extended
• Protracted
• Olympic race
• It may be a little over 26 miles
• Drawn-out
• Annual Boston race
• Prolix
• Prolonged