The 214th Westmorland County show gets underway at Lane Farm in Kendal today and around 30,000 visitors are expected.
Her Royal Highness The Countess of Wessex is visiting the show, which is one of the largest and oldest in Cumbria.
Sections include cattle, sheep, goats, horses, pigs, heavy horses, alpacas, dogs and poultry, as well as marquees for The Women's Institute, Learning for Life, Crafts from Cumbria, local produce Food Hall, Rural Crafts and over 350 trade stands.
More top news
The fire subsequently spread to the premises next door, resulting in over £300,000 worth of damage.
Emergency services and Cumbria County Council have been called to the incident.
Alan Wilson pleaded guilty to nine offences and was sentenced to a 225 hours Community Payback Order at Jedburgh Sheriff Court.