Related Clues:

• Something to do at 77-Across
• Hit the trails
• Something to do at 39-Down
• Treadmill unit
• Lap, maybe
• 1,620 yards, in Old Rome
• Have a peak experience?
• Biathlon gear
• Runner, of sorts
• You can do it on water or snow
• Try a run
• Go downhill fast
• Boot holder
• Item between two poles
• Participate in a biathlon