Gareth Mitchelson Championships are held at the Cowal Gathering in Dunoon on the last Saturday in August each year. Whilst still at school Mitchelson was a member of the world-renowned British Caledonian Airways pipes and dance corps, performing at Scottish events all over the world. In 1985 Gareth and Deryck Mitchelson commissioned new work and music for inclusion in Glasgow's Mayfest dance festival and formalised this with the formation of the CelticSpirit Dance Company as a limited liability company. Other notable performances have included participation in many folk festivals and fiddlers' rallys, in the Capitol Theatre and His Majesty's Theatre in Aberdeen,
The Gathering 2009 fiasco in the Scottish Press. The Gathering took place at Holyrood Park between 25–26 July. On the evening of 25 July, about 20,000 people lined the Royal Mile and watched the parade of about 8,000 clan members and pipe bands march from the Palace of Holyroodhouse to Edinburgh Castle Esplanade. The Duke of Rothesay officially opened the weekend event, which attracted over 47,000 people from at least 40 different countries. 125 Scottish clans were represented and 85 clan chiefs were also present. Visitors enjoyed traditional Highland Games, piping, dancing, live music performances, and sampled Scottish food, drink, as well as