Brent Dirks writing for AppAdvice:
On Saturday, July 15, anyone worldwide with an Apple Watch can complete a walk, run or wheelchair workout of 3.5 miles to earn a special award and exclusive iMessage stickers.
The distance was chosen because it matches the length of a hike from Old Faithful to Mallard Lake in Yellowstone National Park – the first national park in the United States.
I love these activity challenges. I think Apple has definitely hit on something to get people out and about on special days.