SATURDAY, OCTOBER 24, 2026
Camp Greenough | Yarmouth Port, Cape Cod

Choose your distance.
Choose run or ruck.
Just challenge yourself.

A timed trail challenge on a closed 5K loop. Take on the 5K, 10K, or six-hour challenge (as many 5k loops as possible).

REGISTER

Choose Your Challenge

STEP 1:

CHOOSE YOUR DISTANCE

5K: One loop. Great for first-timers, fast runners, and anyone ready to send it.

10K: Two loops. Challenging, but doable.

6-HOUR CHALLENGE: Complete as many 5k loops as you can in six hours. Go for two hours, push for three, or keep moving for all six. Make it a challenge and see how far you can go.

STEP 2:

CHOOSE TO RUN OR RUCK

RUN: No weight- just run.

RUCK: 30lb (Men)/20lb (Women)

All Ruck weights are dry weight and do not include water. See below for more details on ruck standards and rules.

*Participants must choose Run or Ruck at registration. Divisions cannot be changed on race day.

STEP 3:

REGISTER!

Grab some friends, get registered and join in on the fun.

REGISTER

Who is The Relentless Run & Ruck Challenge for?

The Relentless Run & Ruck Challenge is for runners/trail runners who want a simple, timed event, ruck athletes who want a legit course and standards, lifters/ CrossFitters/ HYROX/ hybrid/ functional fitness athletes who want a new challenge, walkers/hikers who want to be part of the fun, and anyone who wants to push themselves and have some fun.

All fitness levels are welcome - come push yourself and see what you’re capable of.

Separate Run and Ruck, Male/Female Divisions

  • 5K/10K: Ranked by fastest finish time 

  • 6-Hour Endurance Challenge: Ranked by total distance completed (ONLY COMPLETE LAPS COUNT) Tie breaker: final fastest complete lap.

  • Top 3 Run (M/F) for 5k and 10k

  • Top 3 Ruck (M/F) for 5k and 10k

  • Top 3 6-Hour Run (M/F)  

  • Top 3 6-Hour Ruck (M/F)

  • “Relentless Award” for grit

Scoring & Results

Weight Rules & Approved Ruck Setup

Mandatory ruck weigh-in will take place before the start and at the finish line.

  • Men: 30lb, Women: 20lb

  • Required ruck weight must be non-consumable and non-wearable. No food, water, or clothing used as required weight

  • You can carry extra supplies (food, water, layers, etc.) Just know this counts as additional weight on top of the required division weight

  • Required weight must be carried on your back as a traditional ruck. Any backpack/ruck is acceptable. Plate carriers are NOT allowed

  • During the event, you may take your ruck off, but you may not make any forward progress without your ruck on your back.

  • No sling bags or duffel bags

  • No trekking poles allowed

If you have questions about your ruck set up, email katie@stay-relentless.com

Official Charitable Beneficiary and Community Impact Sponsor

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.

Frequently Asked Questions

  • Yes - there’s a big jump from the 10K to the 6-hour challenge. But the 6-hour event is about challenging yourself.

    You can: go for 2 hours, push for 3, see if you can make it to 4, or go for all 6 hours .


    The goal is to challenge yourself, and for some- to strive go further than you’ve gone before.

    You can move at your pace. Take breaks if you need to.  And keep going as long as you want/can.

    That’s the spirit of the challenge. 

    This event is also about getting outside, working hard, pushing your limits, and supporting each other.

    Challenge yourself- you may just find out you’re capable of more than you realize.

  • The final schedule will be posted closer to the event, but here is the tentative race day schedule:

    8am: 6 Hour Start
    9:45am: 10k Start
    10:00am: 5k Start

  • Located at the Start/Finish, athletes will be able to setup their own personal area (bring your chairs, coolers, etc.)!

    A great place for spectators to hang out and watch/cheer on athletes as they come through.

  • 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.

REGISTER!

Thank you to our sponsors!

Interested in sponsoring the Relentless Run & Ruck Challenge? Reach out to katie@stay-relentless.com

We’d love to have you participate in The Relentless Run & Ruck Challenge! Questions?
E-mail katie@stay-relentless.com