Related Clues:

• Go for a run
• Knowledgeable
• Do a 20-Across
• Something to do at 77-Across
• Hit the trails
• Something to do at 39-Down
• Oft-replaced part
• In style
• Have a peak experience?
• Pelvic bone
• Biathlon gear
• Runner, of sorts
• You can do it on water or snow
• Try a run
• Go downhill fast