"The Next Loop" Endurance Series: 50K, 50-Mile, 100K, 100-Mile Trail Run Challenge

Non-registered park users please note: Part of this event takes place overnight. Nighttime trail use is for registered event participants only. Regular park hours apply otherwise.

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Event info:

Four distances. One course. One question—how far will you go?

Welcome to Pinnacle Mountain State Park for a continuous, loop-based ultra trail running event built around one simple idea: every mile matters. Choose from the 50K, 50 Mile, 50 Mile Night Challenge, 100K, or 100 Mile and experience a race where consistent support, smart pacing, and personal determination matter more than complicated logistics.

Every lap follows a scenic 3.5-mile trail loop (mainly on Coachwhip Trail) before returning to the central Start/Finish hub, where you'll find a fully stocked aid station, access to your crew and personal gear, and encouragement from fellow runners.

Choose your challenge:

• 50 Mile Challenge: 7:00 AM start • 14-hour cutoff
• 50 Mile Night Challenge: 9:00 PM start • 14-hour cutoff
• 100K Challenge: 7:00 AM start • 30-hour cutoff
• 100 Mile Challenge: 7:00 AM start • 34-hour cutoff

Each event uses the same 5K loop course, allowing runners to focus on pacing, nutrition, and endurance rather than complicated logistics. Chip timing records every completed lap, giving runners and crews real-time insight into pacing and progress throughout the race.

Who this race is for: Whether you're running your first ultra or chasing a new endurance milestone, The Next Loop Challenge Series offers four professionally supported trail races designed for athletes who value smart pacing, efficient logistics, and a supportive race atmosphere.

Register online here: https://ultrasignup.com/register.aspx?did=139109

 *This event is managed by The Next Loop Endurance Series (www.everfurther.net/the-next-loop)