When i first read this thread i thought about Sweidsh miles, i thought that 2 miles in 21 minutes is a tad bit hard. Two Swedish miles are about 13 american miles

that would mean that you'd have to run 1 km in about one minute, thats a bit extreem.
The "Basker" test is 5 Swedish miles though with full packing, but you only need to walk. Its a test to earn your right to ware the Basker (the barret, and not the weapon heh)
My brother was a tad bit unlucky, he broke something in his hip during this march, but he did earn it on his second try after his hip got better.