Running challenge · Finished September 2026

The Mystery Run

Every night for a month, Harry's revealed a mystery distance. Run it the next day and earn a ticket for every kilometre.

This one's finished. Get the app and find the next challenge in the Challenges feed.

A pair of running legs in yellow shorts with a mystery face tattooed on the calf, from the Mystery Runner badge
Watch: how it works
01 How it worked

Nobody knew the distance.

Each night, the next day's distance went up on the app news feed and Harry's socials. Run it the next day and you earned a ticket for every kilometre, up to the day's distance.

Fall short and you still banked a ticket per kilometre you ran. You could split it across the day, treadmills counted, there was no minimum pace, and you only ran the days you wanted to.

Days
30
Run the ones you choose
Tickets
1 per km
Up to the day's distance
Min pace
None
Treadmills counted too
02 How it went

378 runners. 30,232km of mystery.

Over 30 days of surprise distances, the field logged 2,566 daily entries in the Harry's app. Here's who ran the furthest.

378Joined
30,232km logged
2,566runs logged
30days

Top 3 men

  1. 1Paul P.800.0 km
  2. 2Mitch M.713.7 km
  3. 3Brendan S.611.3 km

Top 3 women

  1. 1Tamara U.463.0 km
  2. 2Nagiska M.391.6 km
  3. 3Laura C.364.2 km
03 The Rules

Same day or it didn't count.

Each day's distance had to be run on the day and logged as that day's single entry in the Harry's app. Any of these and the run didn't count.

01

Backdated from an earlier day.

Didn't count
02

Not tracked on a GPS wearable.

Didn't count
03

Missing distance, elapsed time, pace or heart rate.

Didn't count
04

No image proof uploaded.

Didn't count

Tracking & Submission

  • GPS wearable: COROS, Garmin, Apple Watch, Strava, etc.
  • One upload a day. Split runs were fine, as long as every run went into that day's single entry.
  • Upload image proof, and add the Strava link if you had one.
  • Issues? ethan@hardcoreharrys.com.au

Next time

The Mystery Run was free to enter with the Harry's app. It's finished, so download the app and grab the next challenge from the Challenges feed.

Get the app
Show full disclaimer

Participation is voluntary and at your own risk.

You confirm you are in good physical health and assume all liability for any injuries. Hardcore Harry's AU PTY LTD reserves the right to disqualify any entry that violates submission rules. Repeated violations may lead to removal from the challenge.
04 The format

What is a daily streak challenge?

A streak challenge asks you to do something every day for a set run of days. The daily target is usually modest. The challenge is turning up again tomorrow, and the day after that.

That's what makes streaks work for building a habit. You stop deciding whether to train, because the only question left is when. Most people find a time of day that sticks, early morning or straight after work, and protect it.

In the Harry's app every day you complete counts on its own, so a missed day costs you that day, not the whole challenge.

Streak
A run of consecutive days where you hit the target.
Daily minimum
The least you have to do for the day to count.
Consistency
Showing up often, the thing streak challenges reward most.
How it works in the app

From download to the draw.

  1. 1

    Download Harry's

    Free on the App Store and Google Play.

  2. 2

    Join the challenge

    This one's finished, so find the next challenge in the Challenges feed and tap join.

  3. 3

    Do it. Prove it.

    Track it with your watch or a running app, then log it in the Harry's app with a screenshot or your Strava link.

  4. 4

    Climb the board

    Every entry goes on the leaderboard, and earns your shot at the prizes.

The Harry's app: a challenge's prize pool and rules, and the screen for submitting an entry
FAQ

The Mystery Run challenge, explained.

A month-long running challenge in the Harry's app that ran through September 2026. Each day had a mystery distance, revealed the night before, and running it earned you that many tickets into Harry's monthly prize draw.
From 4am AEST Tuesday 1 September 2026 to 11pm AEST Wednesday 30 September 2026.
The day's distance set the maximum. If the distance was 10km, running the full 10km earned 10 tickets. Run less and you still earned a ticket per kilometre, so 7km earned 7. The top three on the leaderboard earned 10, 5 and 3 bonus tickets when it closed.
On the Harry's app news feed and social media, the night before each run.
No. You only ran the days you chose to, but each day's distance had to be run on that day. No backdating.
Yes to both. You could split it across the day, for example 10km in the morning and 10km in the afternoon, as long as every run went into that day's single upload. Treadmill runs counted and there was no minimum pace.
Yes. The app is free to download and the Mystery Run was free to enter.
In the Challenges feed in the Harry's app. You take part wherever you are, so download it free and watch for the next one.

What's Next?

Download Harry's free and watch the app for the next one.