Don’t be a lazy bones, reach your Ghouls this October. Take on our Halloween themed accumulator challenge – we dare you!

Complete 15 runs (or more) of any distance in October and you’ll earn yourself a frighteningly awesome Halloween medal. To add some extra spice to the cauldron, the challenge includes an optional distance challenge, with a bespoke digital certificate awarded to anyone who completes a distance award.

The challenge started on 1 October and ends on 31 October (Halloween!). It costs £10 to join – your challenge joining fee includes a unique finishers medal, access to training plans & tips, access to our online tracking tool, and activities to motivate you through the challenge. It really is a challenge to sink your teeth into!

Entries to the October Accumulator challenge are now closed. If you missed out don't worry, we're launching our next Accumulator challenge very soon...

How it works

  1. 1 Enter the Challenge any time until 8 October
  2. 2 Start running from 1 October
  3. 3 Keep a track of your 15 (or more!) runs
  4. 4 Complete the challenge by 31 October
  5. 5 Submit your final results to receive your Halloween medal

The challenge

The monthly accumulator challenge is for runners aged +15.

Complete 15 runs in October

You can run at any pace and distance comfortable for you. Complete a minimum of 15 runs by 31 October to finish the challenge, and you will receive a special edition Halloween medal and digital certificate.

(optional) Accumulator Distance Award

There are three optional distance challenges. Depending on how far you run over your 15 (or more!) runs we will award you a bespoke digital finishers certificate to download and share:

  • Blow off the cobwebs - 40 Miles
  • Ghoul beater - 75 miles
  • Run for your life - 125 miles

You can use our online tracker to log your runs, or use your own tracking app or device to record your activity. Once you have completed 15 runs (or more) and your target distance, simply submit your results and confirm that you have completed the challenge.

Tricks & Treats

To keep you running!

To keep you motivated and smiling (not grimacing!), we’ve created a series of fun extras to see you through your month of running.

The Halloween Run

Finish the challenge off in style on Saturday 31 October! To set the spooky scene, we’ll be awarding prizes to the scariest looking runners out there… whether you run alone, as part of a daunting duo or terrible trio (please adhere to local alert level guidelines), dress to scare as you head out for your final run.

Share your pictures with us on social media using #GreatRunSolo; we’ll pick our favourites and the lucky winners will receive a prize.

Challenge Checklist

15 runs (or more) is a lot of running… and plenty of time for you to complete the challenge checklist.
How many can you tick off?

Halloween Playlist

Help us track down the ultimate Halloween tunes for our Spotify playlist! Add your favourites and then enjoy the soundtrack on your next run. Add songs to the playlist here.

Halloween Howler Sprints

Throw some extra sweat & spice into mix… Add six 30 second hill sprints to one of your runs!

Your Challenge Highlights

Share your running pics & videos with us on social using #GreatRunSolo to appear in our Halloween challenge review video.


We've created an exclusive, limited edition Halloween Accumulator challenge t-shirt. Available to buy from the Great Run Shop - Pre-order yours now.

Buy online

What you get

Complete the challenge by 31 October and we’ll send you a Spooktacular Halloween medal. Digital certificates are available to download when you submit your results.

Please be patient as medals will arrive approx. 1 month after you have completed the challenge. For international runners, there is an additional £3.50 charge to cover medal postage.

Supporting Charities

If you take on the Great Run Solo monthly accumulator challenge, why not fundraise for a charity at the same time? Choose a charity and encourage your friends, family and wider supporter network to rally behind you! You can start fundraising and set up a JustGiving page.

Start Fundraising


The Great Run Solo Accumulator challenge is a month long challenge. The challenge starts on the 1st day of the month (i.e. 1st October) and ends on the last day of a month (i.e. 31st October). To complete the challenge participants must complete 15 runs (or more) during the month. The runs can be of any distance.
Entries for the October Accumulator Challenge open on 21 September and close on 8th October at 10am.
Yes, as long as you enter before the 8th October then you can still join the challenge. If the date is after the 8th day of the month, you will need to wait to join the Accumulator challenge in November.
Everyone who completes 15 (or more) runs will receive a special edition medal. The second part is to tally up the distance that you’ve completed over all of your runs (15 or more). Depending how far you have run across the month, you may have earned a distance award.  Anyone who has earned a distance award will receive a digital finisher’s certificate. 
You don’t need to enter this separately – if you have already entered the Accumulator Challenge then you already have the chance to achieve a distance award.  At the end of the challenge when logging your results you will need to calculate the total distance that you’ve covered..
You can choose to log your runs as you go through the challenge using our online run tracker.  This will make tracking your progress and submitting your challenge results easier.  To do this you will need to enter your Great Run registration ID, which can be found on your entry confirmation email, and date of birth. Alternatively, you can choose to keep track of your runs yourself, and simply visit the results submission page at the end of the challenge. If you choose this option you will need to:  enter your total running time, total distance, upload a (optional) screenshot of your activity, and confirm that you have completed the challenge. 
Yes you can do more than one activity per day, but don’t overdo it! 

Yes, you can use a treadmill to reach your target.  Just remember to track the activity.