June 24, 2025 International Mud Day at Pittsburgh Botanic Garden Children should dress to make a mess and bring a towel and change of clothes to the Pittsburgh Botanic Garden’s International Mud Day event on Sunday, June 29. Learn More Hoses will be provided for cleaning off and a changing tent will be provided. Children will be able to play in a mud put or explore the outdoors. Accompanying adults may watch from a clean distance or participate in the messy event. Activities are included in daily admission to the botanic garden. More information can be found on the event’s website.