It had been held annually but was suspended in 2006 when the £25m redevelopment of the campus began, although the college was able to stage the Fédération Equestre Internationale European Pony Championships, which attracted 5,000 people last year.
This year Town and Country will incorporate the college’s British eventing horse trials.
College principal Jeanette Dawson said: “We will have plenty of people on campus enjoying the horse trials, who will no doubt appreciate some extra entertainment, plus the Town and Country event will attract visitors who may not ordinarily attend an equine competition.
“There will be something for everyone and the chance for everyone to try something new.”
A series of activities with a rural theme will take place in the grounds, including falconry displays, chainsaw sculpting, woodland crafts, archery, wheelchair basketball and “welly wanging”.
Ms Dawson added: “Now all of the major works on campus are complete we have decided to throw open their doors once more and welcome visitors to see the new-look campus and enjoy plenty of entertainment and activities.”