Strava Global Heatmap

Strava has released a Global Heatmap powered by Mapbox GL, plotting all locations where their users go run / go cycle / do water activities / do winter activities.

The raw input activity streams data comes from a Spark/S3/Parquet data warehouse. This data includes every one of the 3 trillion GPS points ever uploaded to Strava. Several algorithms clean up and filter this data.


The full global heatmap was built across several hundred machines in just a few hours, with a total compute cost of only a few hundred dollars.

I like the fact that it’s possible to filter on activity type, revealing some hotspots like Wielercentrum Eddy Merckx for cycling, and the adjacent Watersportbaan and Blaarmeersen for running in Gent.

Strava Global Heatmap →
Strava Engineering: The Global Heatmap, Now 6x Hotter →

What Will It Take to Run a 2-hour Marathon?


The current world record of 2:02:57, set by Kenyan Dennis Kimetto this year in Berlin, works out to 4:41.5 per mile; a sub-two would require less than 4:35 per mile. Will a human ever run that fast?

Some fascinating number-crunching, and some great conclusions/predictions too.

What Will It Take to Run a 2-hour Marathon? →