Related Clues:

• Short swim
• Track circuit
• Pool unit
• Complete circuit
• Trip around the track
• Full circuit
• Track unit
• Running-track unit
• 2.5 miles at Indy
• Swimmer's unit
• Single circuit
• 440 yards, for many runners
• Quarter-mile, maybe
• Race margin, maybe
• How much there is to go when the white flag comes out