How to recover lost rides on Strava

I recently started biking, and the fact that I’ve kept at it is due in no small part to Strava.  I really like tracking my progress, seeing how I compare to others and myself.  I’ll admit on more than one occasion, I’ve chosen to ride just to see those weekly numbers tick up.

My obsession with stats can obviously only be sated with more stats.  After putting in the time on long rides, I pore over each segment seeing how my performance stacked up from week to week.  Today, I went on a long ride (~37 miles) going up Montebello road and then down Page Mill.   I huffed and puffed, facing cold rain atop Black Mountain, a sore elbow and unhealthy wobbles descending on the dirt road that almost ended with me eating shit. Yet I was happy to do it all so I could see my stats.

random strava logo

Then the terrible occurred – when I went to upload the file, nothing appeared in my feed. I waited … then waited some more … and then some more.  It still wouldn’t appear!  I tried recording another activity just to make sure I was able to upload files and it recorded just fine.  Mortified, I thought my three hour suffer-fest would end with nothing to show for it (because in reality, what’s the point of riding without obsessing over times?).

Disclaimer: To be fair, I’m not sure I waited the entire time for my file to upload (it was pretty big, around 2.9 MB, and speaking of which Strava, I highly suggest you compress the files before upload, it would make them so much faster to upload), but still I thought that it was just taking the Strava servers some time to process.

However, it turns out that after a little digging in, I was able to recover the file and successfully upload it to Strava’s servers.  Here’s the process to do so, so your precious activity doesn’t go uncollected.

First some context:

I have an iPhone 6 plus, running iOS 9.3.2 and Strava v.4.16.0 (4015).


1. First, make sure the file is still on your mobile device.  On the iPhone, you can connect your phone, open up iTunes, and navigate to Apps/Strava where you can see all of your activities.  Here’s what it looks like: 

Note: If you don’t have this file anymore, unfortunately I think you’re hosed.  You can always try to contact Strava to see if your file is on their server somewhere.

Screen Shot 2016-05-21 at 3.26.59 PM
iTunes strava app data view

2. Next, locate the file that failed to upload to Strava.  This may take a little bit of guess and check, however if it’s your latest activity, you’ll see it sorted by timestamp so it should be at the end:

Screen Shot 2016-05-21 at 3.27.51 PM

3. The next part is a little tricky.  You can save the file to your local machine by right-clicking “Save to…”.  And then you can open the file in a text editor.  I used sublime text (hey I’m a dev).  The file will be huge and looks something like this:

Sample file:

strt: t:485449851.286994
lvseg: t:485537646.134324 on:1
wp: lat:37.337964; long:-121.979434; hacc:5.000000; vacc:3.000000; alt:38.173744; speed:3.720000; course:268.593750; t:1463844846.142122; dt:1463844846.142122; dist:7.644818
wp: lat:37.337964; long:-121.979434; hacc:5.000000; vacc:3.000000; alt:38.173744; speed:3.720000; course:268.593750; t:1463844846.142135; dt:1463844846.142135; dist:7.644818
relv: v:0.977640; t:1463844846.825438;

Side note on understanding the file.  I don’t work for Strava, so I’m just spitballing here, but the file is obviously appended to as your activity takes place.  Here are some guesses as to what each datapoint means:

strt: looks like start

  • t: unsure.  At first I thought timestamp, but the value is way too low (resolved to somewhere in 1985).  So still a mystery.

lvseg: looks like live segment

  • given that strava just added this, I’m going to guess that this means you’re doing a live segment and on: 1 means it’s recording

wp: looks like these are the main data points

  • lat: latitude
  • long: longitude
  • hacc/vacc: horizontal/vertical acceleration
  • alt: altitude
  • speed: self explanatory
  • course: unsure
  • t: start timestamp
  • dt: end timestamp
  • dist: distance (in kilometers, I think)

relv: relative velocity (maybe)

So essentially, by looking at the latitude and longitude and timestamp, you can figure out where you were at what time.  It’s a little bit tedious to do so (if you’re trying to upload an old file), however you can avoid this if it’s your most recent activity.

4. My Strava refused to upload this file (also, it had a timestamp in the past), so I’m guessing that somewhere on your mobile device strava marks certain events that you decide not to upload and skips over them when the app boots up.  

To work around this limitation, I simply recorded a new activity and brought myself to the screen before the “save” screen.  

Don’t hit “save” yet.

You can see in iTunes that a new file was generated with the correct timestamp.  I next clicked “Save to …” to copy this to my local machine, where I brought it up in sublime again.  Note the UUID (DF5…857A831ECFD) looking thing so you can locate the file after you copy it locally.

Screen Shot 2016-05-21 at 3.36.17 PM

The file looks like this (note how small it is since we only recorded about 9seconds worth; also maybe interesting, Strava filling up your phone maybe @ 0.5 – 1KB/second means that each hour of activity is very roughly few MB, probably depends on the # of breaks you take):

lvseg: t:485562945.972006 on:1
strt: t:485562945.983277
wp: lat:37.338599; long:-121.978195; hacc:10.000000; vacc:32.000000; alt:54.916534; speed:0.620000; course:-1.000000; t:1463870147.006819; dt:1463870147.006819; dist:0.000000
wp: lat:37.338570; long:-121.978124; hacc:10.000000; vacc:12.000000; alt:42.931915; speed:0.000000; course:-1.000000; t:1463870148.002843; dt:1463870148.002843; dist:0.000000
relv: v:0.000000; t:1463870148.671240;

Next what I did is copy the contents of the original file into this file, essentially deleting everything in this file after the “strt: t:485562945.983277”.  Not sure if this is strictly necessary, but at any rate, it probably doesn’t hurt.

5. Finally, the last step is to copy the modified file (with the same filename) back to iTunes.  iTunes will prompt you for whether you want to overwrite the file.  Hit “Replace”.

Screen Shot 2016-05-21 at 3.40.30 PM 

Now you’ll see that the file changes size on your iPhone.

Screen Shot 2016-05-21 at 3.41.34 PM

8. Now you can hit “save” on your Strava app.  If you did everything right, you’ll see that the activity gets uploaded and parsed by Strava’s servers.  If it’s a large file, it may take some time.

That’s it!  Your precious stats are back.

Note to Strava developers: you can probably encrypt these files rather than store them in plaintext.  I’m not saying I would ever mess with the GPS coordinates or timestamps to hack my way to King of the Mountain status or anything, but others might. 😉

Hooray! I have a reason to ride again!



9 thoughts on “How to recover lost rides on Strava

  1. Thank you codeandcodes for taking the time and care to publish this very informative post. It provides great insight into the way that these technologies work.

    I had a similar horror-moment when trying to delete a single photo on my iPhone app, but instead deleted the entire activity. I was just about to embark on following your detailed procedures but found I did not have to because the Strava Support Team came to my rescue.

    Kudos and any thanks to Keith of the Strava Support Team who very promptly rectified my accidental deletion. All I had to do was send a polite request explaining my situation at:

    Don’t be caught – that “Delete” button on the mobile app is a little too powerful, and you don’t get a chance to opt out. It is bit obscure, but the official warning is here:…/216917357-Edit-or-Delete…. One might hope that future app updates provide an opportunity to gracefully back out of such deletion operations before they are committed.

    For anyone else in a similar situation, below is a copy of the note I sent to:

    Hello, while tweaking photos I accidentally deleted a ride that I did today, begun 9:15 AM on Sunday, October 30, 2016 and I do not know how to restore it. The details were saved as “Donna Buang first assault – Healsville loop”

    I thought I was deleting a single photo (as I had a better one to post), but instead the entire activity was deleted (without offence, a simple warning/question with a back-out option would probably have prevented this from happening.)

    Can you please, please restore it to my profile? The ride was captured and saved on my iPhone using the app, so I don’t have a GPX file.

    My URL is

    This is the largest cycling ascent that I’ve ever done and I consider it a meaningful achievement. It would mean a lot to me of this could be fixed.

    With thanks, Andrew 🙂

  2. Thank you, codeandcodes, for sharing this method. I used it when accidentally deleted activity in Strava being on desktop. There is no undo button in the interface you can find in this case… By chance Strava on my iPad (by which activity was written) was still not synchronized when i recognized my mistake. So, my problem was similar to yours. At the end I manage to save my ride. As fan of riding you can imagine how delightful it was! Thank you once more!

  3. It will still say that the length of ride was 0:00 and no average speed is displayed. This is probably a result of not changing the time. I can live with these two things missing if it means recovering the other parts of the ride though. Thank you!

  4. so glad I found this! was disappointed after a hard ride to find that strava somehow deleted my ride after I paused it? your clear and detailed write-up provided an interesting peek into the strava machinery within and a fun way to feel like a hacker!

  5. Hello,
    Could you please explain how to get to the iTunes data app view screen? Is this on a laptop? As I can’t locate this anyway.

    Thank you,

  6. Wow, this article saved me! I had no idea there was a local storage of the files — you’d think there’d be an option in the app to “recover” an activity that they have data for but hasn’t been posted. Either way, thanks so much for writing this up!

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