The challenge is an off-shoot of a local ride I do each year in Colorado Springs. https://719ride.com. This is the DIY version (https://719ride.com/diy-719/). It’s not quite a World Wide Disaster Day, but it will take some time and effort to complete.
You complete a 71.9 mile ride with at least 7,190’ of climbing.
But you can’t ride more than 71.99 miles, ride on your trainer, use an electric bike, or repeatedly go up and down the same climb like you’re Everesting. That last bit just adds a small logistical hiccup to the physical challenge.