Related Clues:

• A long one may have legs
• Tour de France, e.g.
• Off-track betting event
• Santa Anita event
• Marathon, for one
• Census category
• Tortoise/hare contest
• Steeplechase
• Formula One event
• 57 Across, e.g.
• Cycling event
• Strong current
• Swift current
• Humankind division
• Move swiftly