Most Difficult Long Run Course | 2K | Running Gear Haul - Seth James DeMoor

Aug 13, 2025

Intro: This is a quick summary of Most Difficult Long Run Course | 2K | Running Gear Haul from Seth James DeMoor. It’s a great watch — we’re breaking it down so you can try the workout today. Be sure to check out the full video for all the details.

Key Points:

The 2 k‑mile loop around Boulder packs about 2,000 ft of up‑and‑down elevation, making it the hardest long‑run loop Seth does.
He logged 23 mi at roughly 7:26‑7:27 min/mi (average pace) and hit a wall in the last 8 mi due to insufficient hydration.
Emphasizes recovery gear (compression sleeves, wool socks) and the importance of carrying enough fluid for long, hilly runs.
Treat the loop like a race simulation: steady effort, focus on hill technique, and plan nutrition/hydration ahead of time.

Workout Example:

Goal: 23‑mile long run on the 2 k loop (≈2,000 ft gain)
Pace: ~7:30 min/mi steady effort (adjust to your own marathon pace)
Structure:
- Warm‑up: 1‑2 mi easy jog
- Main set: 10‑12 laps of the 2 k loop (≈20‑24 mi total)
  • Keep effort consistent on up‑hills (shorter, quicker strides)
  • Recover on down‑hills, but stay moving
- Hydration: Carry at least 1.5‑2 L of fluid (hand‑held bottle + small pack) and sip every 15‑20 min.
- Nutrition: 30‑45 g carbs per hour (gels, chews, or fruit).
- Cool‑down: 1‑2 mi easy jog + stretch.

Feel free to shorten the total mileage or adjust the pace to match your current training level.

Closing Note: Give this challenging loop a try, tweak the distances and paces to fit your own plan, and log it in the Pacing app. Have fun, stay hydrated, and keep seeking beauty on every run!