Walk home from school...

I wonder whether there's a website that measures distances walked (or meandered) across country? I've used routefinder-type-thingys in the past to measure distances travelled, but today we went off-road and would like to know how far the little ones walk for when I get fit enough to run it (don't laugh). Will keep looking... suffice to say that we had a wonderful walk home from school today across fields and parks and lanes. Yoda is thrilled and the children all arrived home relaxed and settled down to their homework beautifully (!) and are now enjoying a dusk bounce on the trampoline. Lovely.