100 Days of Running 2021

world's biggest fitness challenge Register now



100 Days of Running started in 2015 with a goal of bringing fitness to your doorstep. A challenge unlike any other, motivating and lifestyle changing, Run a minimum of 2 km a day for 100 days and take your fitness to the next level. This is your opportunity to turn a sedentary lifestyle into an active one, forever!

100 Days of Running is the flagship running event of HDOR platform. With 15,000 participants in 2020, this is the biggest multi-day running challenge in the world.


Take on the challenge

Plan what you want to achieve in the 100 days, whether it’s your target mileage, or number of days to run.

Run a 100 days

Complete your daily run for each day between May 1st and Aug 8th. Recovery walks or skipped days are fine too.

Run anywhere, anytime

Being a virtual event, you are free to run where you want, when you want without being bound by any time restrictions.

Submit your run data

Submit your run data on event website or app, compare your results with other participants. We can import your run data automatically!


The goal of the event is to motivate all participants to achieve their best, and get maximum fitness benefits from this challenge. Missing a few days here and there due to personal work/life commitments will not disqualify you from the event.

To qualify for the finisher medal, participant must submit your run activity data (run + walk is fine too) for at least 40 days.


1. Only one activity considered for a day (longest distance one)

2. A new points based leaderboard, based on number of days followed by points earned for each activity (activity points = distance points + pace points)

3. New couple & family leaderboards


  • days
  • hours
  • minutes
  • seconds


Every step you take, every run you make, is going to matter. This year, as you run through 100 days, you will be bringing smiles to people who need them the most. Team HDOR will contribute a certain amount to selected charities depending on how many days you ran.

We raised an amount of ₹ 3.24 lakh / US$ 3000 in 2020 via our charity initiative.

You RunWe Contribute
All 100 days₹ 50
80 to 99 days₹ 40
60 to 79 days₹ 30
40 to 59 days₹ 20
20 to 39 days₹ 10

You want to make the biggest contribution? Make sure you run a 100 days!


What better to drive you towards a goal, than a beautiful participant t-shirt which will motivate you to go out everyday, and get your daily target done

Available in gender specific styles too (men & women), as an optional item when you register!

* t-shirt design is indicative and may be changed


We are going to have a beautiful finisher medal in the 2021 edition, don't miss yours!

* medal and trophy designs are indicative and may be changed


Podium trophy for top 5 age-category places (men & women) of all age categories.

Leaderboard & Reports

Once you have registered for the event, you will be able to download the official HDOR app (iOS | Android) and view your event stats for your submitted activities.

Check your rank against other participants as well as check out the podium place finishers in each event category.

You will also be able to view all the reports and leaderboards using your HDOR login account on your laptop or computer.

You can check the 2020 leaderboard here to see how our 15,000 participants did in the 6th edition!

Use Your Favorite Apps

Being a virtual event, participants need to submit their activity details online using any of the multiple apps we support.

You can record and submit your activity using Strava, MapMyRun, Runkeeper, Garmin Connect, TomTom Sports, Fitbit or Apple Watch, in fact any other mobile app which supports sharing your activity data as a public GPS activity link.

We also support automatic data import from Strava, Garmin Connect & MapMyRun. If you use any other mobile app or device which can export app data to your Strava account, manual data submit is not required.

Register For Challenge

Scale new heights in 2021 with the 100 Days of Running Challenge. Sign Up now!

Entry Only

Rs 599 / US$ 25
  • Entry into the event (EARLY BIRD)

  • Website and mobile app tracking

  • Access to leaderboard and reports

  • Automatic data import from supported apps

  • Finisher certificate

  • Beautiful finisher medal

  • Free global shipping for medal

  • .

Entry + T-Shirt

Rs 899 / US$ 45
  • Entry into the event (EARLY BIRD)

  • Website and mobile app tracking

  • Access to leaderboard and reports

  • Automatic data import from supported apps

  • Participant T-shirt

  • Finisher certificate

  • Beautiful finisher medal

  • Free global shipping for medal/t-shirt

* All prices are inclusive of all applicable taxes and processing charges.
** Early Bird prices are limited to participants registering by Feb 28th. Prices increase to ₹ 699/- / US$ 29 (Entry only) and ₹ 999/- US$ 49 (Entry + T-shirt) from Mar 1st.
+ LOYALTY DISCOUNT: All participants of 100 Days of Running 2020 get a loyalty discount of ₹ 75
++ All loyalty discounts will be automatically applied when making the payment, but only if participant specifies same email when registering for this event as used to register for the event for which loyalty discount is applicable

# GST No. 07AADCG9813F1ZM and CIN No U72200DL2010PTC207844

Group and Corporate Registration

More the merrier! 100 Days of Running is always more fun when you do it with your friends, family, or co-workers. Register as a group and get special discounted pricing as below.

Group Registration Pricing

Number of RegistrationsDiscount AmountDiscounted pricing for ₹629 ticketDiscounted pricing for ₹899 ticket
20 - 49₹100₹529₹799
50 - 99₹125₹504₹774
100 or more₹150₹479₹749
Register your group

* Group discounts for group members cannot be clubbed with any individual level loyalty discounts
# Early bird pricing applies to group registrations also, and limited to Feb 28th, 2021. Regular prices would apply starting March 1st, 2021.
** Group coordinators need to do one time payment for entire group.

Group Registration Process

To register as a group, the group leader or representative has to do the full payment for the entire group. The group leader will then receive an email within 30 mins with a list of registration codes for each member.

The group leader will then be required to share the registration codes with respective group members who can then login to their HDOR account (or create one for free if it does not exist), and apply the registration code to complete their registration.

Event Timelines

Registration start (Early Bird)1st Feb 2021
Registration start (Regular)1st Mar 2021
Participant T-shirt dispatch complete*1st May 2021
Registration close1st May 2021
Event run durationMay 1st to 8th Aug 2021
Last date to submit data10th Aug 2021
Provisional results15th Aug 2021
Final results published20th Aug 2021
Medal dispatch completion30th Aug 2021
* for participants registered by 15th Apr

Rules & FAQs

Have any questions in mind about this event? Check out our Rules and FAQ below.

General FAQ

What is 100 Days of Running?

100 Days of Running is a virtual running challenge in which you are required to run (or run/walk) daily for 100 days, starting May 1st and ending Aug 8th, 2021.

You need to cover a minimum distance of 2 km everyday as part of this challenge.

Completing at least 40 days out of 100 will make you an event finisher.

You may use a mobile app like Strava etc or a GPS watch to record your daily run data.

You can even participate if you do not want to use any app or watch, by just reporting your daily distance and time on event website or app (although we have daily distance submission limit of maximum 5 km in such cases without proof).

For more details about this event, check the other FAQ items.

I have made payment and don't know what to do next

Please visit our new users section on the website which guides participants in a step by step manner on account creation, event confirmation, connecting apps to your HDOR account, data submission, and other useful information.

When do registrations end?

Registrations for 2021 edition will close on Apr 30th.

What is the age eligibility for the event?

Participants must be at least 7 years of age as of event start date, i.e. May 1st, 2021. Parents undertaking is necessary for children under 14 years.

There is no upper age limit for taking part in the event.

How do I login to my account?

Participants who have do not have any pre-existing HDOR accounts need to create one first. Past HDOR participants can re-use their pre-existing accounts to login. In case you have forgot your password, use the forgot password feature on the login page to generate a new one.

How do I qualify for the finishers medal?

Only participants who have submitted valid run data for at least 40 days out of 100 will be eligible for the finisher’s medal.

On what basis are event finishers ranked?

Finishers are ranked on the basis of number of days valid data is submitted for. If multiple participants have same days, ranking will be decided next based on the points earned (points being awarded on the basis of distance covered and activity pace). Both manual submission (with or without link) and automatic imports are considered for ranking, but no pace points will be awarded for any data submission without activity link.

Can my run be disqualified?

Event organizers can reject any entry which has suspect GPS data (straight line outside normal run route, unrealistic high pace like sub 3 min/km pace at any time during run, etc)

Submission of any ride or data using a vehicle will be invalid.

Event organizers have the right to take any decisions for disqualifying a participant if the participant is considered to have taken any external help in running the distance (like using a cycle or any other vehicle) or cheated in any way.

What are the event age categories?

Following are the age categories for the event:

  • 7 years to 12 years
  • 13 years to 18 years
  • 19 years to 24 years
  • 25 years to 29 years
  • 30 years to 34 years
  • 35 years to 39 years
  • 40 years to 44 years
  • 45 years to 49 years
  • 50 years to 54 years
  • 55 years to 59 years
  • 60 years to 64 years
  • 65 years to 69 years
  • 70 years and above

Participant age as on event start date, i.e. May 1st, 2021, will be considered for above categories.

Top 5 men and women as per published rank will receive a podium trophy (days & then points earned basis).

When will I receive the finishers medal?

Please refer to the Timelines section on this page for same.

Who will receive participant certificate?

All participants who have submitted a minimum of 1 day data for the event will receive the participant certificate.

Who will receive finisher certificate?

Finisher certificate will be available for download for participants who submitted at least 40 days valid activity data. It will showcase your rank under various categories like gender, age, city, group, organization, country.

Can I request registration cancellation and refund?

Refund request can be submitted for any individual registrations within 10 days of registrations for entry only registrations and within 5 days for registration with t-shirt option. No refund request will be entertained after that.

No refund request will be entertained for group registrations.

No refund request will be entertained once the event starts on May 1st.

A processing fee of ₹50/- / US$ 2 per ticket will be deducted for all refunds.

Data Submission FAQ

Do I need to use a mobile app or GPS watch to participate?

Using a mobile running app or GPS watch is not mandatory, but is strongly recommended.

You may also submit your daily run data distance and time just by entering that information on the HDOR website or mobile app. A maximum distance of 5 km in a day will be accepted without proof.

Which mobile apps can I use to submit proof of my activity?

Please see the list of supported apps here.

Is there an HDOR mobile app for my mobile phone?

Yes, we have Android and iOS (iPhone users) mobile apps for HDOR. You can download it as below:

iOS | Android

You can use the HDOR app to (1) Submit activity data (2) Check event leaderboards and reports (3) See your run logs

How do I record and submit my run data?

Please refer to the HDOR data submission guidelines page for details.

Can I run indoor or on a treadmill?

Treadmill runs: Treadmill or indoor runs recorded using GPS watches using indoor or treadmill mode, and for which you have a public activity link which shows distance, time, pace, and splits will be acceptable for submission.

However, if you do treadmill running without such data proof, you can still manually submit your daily run data, subject to a maximum distance of 5 Km for a day.

Can I submit data for past dates?

Older date data submissions are allowed for up to 10 days in the past, including the date of run. Example, Jun 15th run data may be submitted latest by Jun 24th. Data submission beyond these prescribed time limits will not be accepted. It is participant’s responsibility to ensure timely submissions.

The last date for submitting all entries after the event is over is Aug 10th. No submissions will be accepted beyond that.

Similarly, in case of any Strava import issues, the participant is required to bring it to the attention of the support team within the required submission timeframe as above.

How do I connect my account to Strava for automatic import?

On your mobile or computer browser head to our website and access the Menu >> Settings >> Connected Apps section to connect your HDOR account to Strava

On your mobile app, visit the Menu >> Connected Apps section to connect your HDOR account to Strava

For step by step process to connect your HDOR account to your Strava account so that all your run/walks are automatically imported, check out the help video on our help and support page.

When will my Strava activity data be imported?

Your run will be available on our website within an hour of your run data submission or post availability in your Strava account if you have connected your HDOR account to Strava.

If your run data is not available in your account within one hour, please submit the activity link and run data manually via app or website, and contact our support team at support@hdor.com.

Can I walk instead of run?

We allow participants to mix running and walking. In fact, we recommend running challenge participants to take a couple of rest days as their recovery days by walking the minimum distance required if any as part of any specific event rules (like the requirement to run daily a minimum distance of 2 km for 100 Days of Running event).

Can I run/walk multiple times a day?

Only the longest distance activity will be considered if you submit more than one entry for the day, i.e. you do more than one run or walk activity.

What is the minimum distance I can submit?

For any data submission, the minimum distance eligible to be submitted is 2 km. No distance less than 2 km will be accepted, or considered valid for the event.

What is the maximum distance I can submit?

With proper proof of activity in the form of a valid activity link from mobile app or GPS watch, there is no upper distance limit for submission.

However, if submission is without acceptable proof, then a maximum distance of 5 km can be submitted.

Our Other Popular Events

As part of HDOR Fitness platform, we have many interesting events you can participate in from our Virtual Run Series and our Fitness Challenges