Related Clues:

• Mudder's day event
• Hustle
• Urge
• Census datum
• 440 or 10K
• 100-meter, e.g.
• Pick up the pace
• Hurtle
• 10K, e.g.
• Recruiting event for frat houses
• Three-legged endeavor
• Take off in a hurry
• Olympic event
• Run quickly
• Breed