Black Diamond Mainline 5K – Montage Mountain Resorts, Scranton

June 29, 2025 | Race begins at 8:30 AM

The Black Diamond Mainline 5K challenges runners to conquer the slopes of Montage Mountain Resorts on Sunday, June 29, 2025. This demanding 5K trail run is the first of two races in the Black Diamond Running Series, designed to test grit, endurance, and determination. Runners can sign up for this event without committing to the full series; the second race, an 8K, takes place on July 27.

All registered participants will receive complimentary admission to Montage Mountain Waterpark following the race—a $34.99 value—and may purchase up to four discounted waterpark tickets for family members at just $15 each. This is a unique opportunity to combine a rigorous run with a relaxing post-race cooldown.