Join the Tradition. The Festival of Trees is an annual tradition at the San Joaquin County Museum. Join us for this festive, two-day celebration of the holidays featuring, crafts, entertainment, food, and beautifully decorated Christmas trees. Enjoy performances by local artists, pick up a festive swag or wreath made by our Docent Council members, and stroll our beautiful 18-acre grounds as you and your families make memories which will last a lifetime.