Thousands of brave Scots arrive at Drumlanrig Castle for Scotland's annual Tough Mudder 2017 – The Scottish Sun | The Scottish Sun
CKB Estate Agents take on the gruelling Tough Mudder in aid of raising money for St. Christopher's Hospice in Sydenham
Tough Mudder 2017 | ken fager | Flickr
Tough Mudder Yorkshire - Official Event Video | Tough Mudder UK 2017 - YouTube
Best obstacle races in the UK: The 8 muddiest events
Hermannsburg, Germany. 15th July, 2017. Participants of the 'Tough Mudder' run through an water obstacle near Hermannsburg, Germany, 15 July 2017. Crawling, brachiating, jumping, burning off all energy and getting dirty -