Relentless Run & Ruck Challenge: 5k/10k/6 Hour Trail Race

Event Overview

The Relentless Run & Ruck Challenge is a trail endurance event built for runners, ruck athletes, hikers/walkers, and anyone who wants to challenge themselves.

You can choose to run/walk (no weight) or ruck with weight.

SIGN UP BY September 24th to guarantee your NOBULL X Relentless t-shirt.

The Course

• Distance: A ~5k loop on the trails of Camp Greenough.
• Terrain: A mix of access roads and single track on a fully closed course.

Event Options

• 5K: One loop
• 10K: Two loops
• Relentless 6-Hour Endurance Challenge: Complete as many loops as possible in 6 hours

Relentless Basecamp

The looped format allows participants doing multiple loops to move through a shared central hub - Relentless Basecamp. Feel free to bring extra snacks, chairs, cooler, etc. and set up at Relentless Basecamp. We'll have encouragement, energy, and good vibes.

Aid Stations

There will be one fully stocked aid station with water, electrolytes, and snacks to fuel your effort. It will be located at Relentless Basecamp (the start/finish). So plan on taking any water/fuel you need for each loop with you.

Divisions (All Events)

Choose your division when you register:

• Run: No weight. Run/walk/hike/shuffle - just keep moving.
• Ruck:
  • Men: 30 lb
  • Women: 20 lb

All ruck weights are dry weight (do not include water).

Scoring & Results

• 5K / 10K: Ranked by fastest finish time.
• 6-Hour Challenge: Ranked by total distance completed. Only complete loops count.
  • Tie breaker: fastest final completed loop

Who This Is For

This event is for:

• Runners: Who want a simple, well-run trail race.
• Ruck Athletes: Who want a legit course and standards.
• Walkers and Hikers: Who want a beautiful course and to be surrounded by great energy.
• Hybrid Athletes: CrossFitters, gym goers who want to test their fitness.
• Anyone: Who wants to push themselves and have some fun.

You can show up and:

• Race it
• Move steady
• Or just see what you’re capable of

All fitness levels are welcome.

Ruck Standards & Rules

Mandatory ruck weigh-in will take place before the start. Rucks may also be weighed at finish.

Weight Rules

• Required weight: Must be non-consumable and non-wearable.
• Prohibited items: No food, water, or clothing used as required weight.
• Additional gear: (water, food, layers) is allowed but counts as additional weight.

Ruck Setup

• Carrying: Weight must be carried on your back in a traditional ruck/backpack.
• Prohibited gear: Plate carriers are NOT allowed.
• Bag type: No sling bags or duffel bags.

On Course

• You may remove your ruck at any time.
• You MAY NOT make forward progress without it on your back.

Additional Rules

• No trekking poles.

If you have questions about your setup, email katie@stay-relentless.com.

Official Charitable Beneficiary

We are excited to have Heroes In Transition as our official charitable beneficiary. HIT provides assistance for veterans, service members, and their families. They aim to strengthen relationships, build community, empower individuals and provide a pathway to healing for those they serve.

Community Impact Sponsor

We are extremely grateful to have Alquist 3D as our Community Impact Sponsor. They will donate $20.00 from every paid event registration to Heroes in Transition.

Cycling the Series +

The Relentless Run & Ruck Challenge is part of a greater weekend of endurance activities on the Cape. If you are a cyclist- please check out Cycling the Series + for more information on both the road and gravel rides on the same weekend!

Event Details: Registration Link

Date: 2026-10-24

Location: 227H Pine St, Yarmouth, MA

This event is Sanctioned and Insured by USA Track & Field.

Thank You to Our Sponsors