CastleTrek Challenge raises £20,000 for charities CastleTrek have completed their mammoth 480 mile challenge from Windsor Castle to Edinburgh Castle in only 10 days and raised £20,000 for the Household Cavalry Foundation and the Royal British Legion in the process. See them cross the (rather wet) finishing line here. Find out more about their epic journey here. and once you’re rightly impressed, HELP THEM RAISE MORE by donating here. Thank you.