hop so far, reach hopping; (до) hop (to, as far as); (верхом) gallop (to, as far as), reach at a gallop (d.)
он не смог доскакать — he could not hop that far
он доскачет туда в 10 минут — he can gallop there in ten minutes, it will take him ten minutes to gallop there, ten minutes' gallop will take him there