Which Fall Festivals can I attend in King of Prussia this weekend?

Here are the best Fall Festivals happening in King of Prussia this weekend:
- Upper Merion Township's Annual 2025 Community Fair and Fall Festival is happening on Sat 04 Oct 2025 from 12:00 PM onwards at Heuser Park, King of Prussia
- Upper Merion Township Community Fair and Fall Festival is happening on Sat 04 Oct 2025 from 12:00 PM onwards at Heuser Park, King of Prussia
- Senior Dog Haven @Upper Merion Community Fair & Fall Festival is happening on Sat 04 Oct 2025 from 12:00 PM onwards at Heuser Park, King of Prussia
- Acoustic Ferrari Live at Upper Merion Fall Festival is happening on Sat 04 Oct 2025 from 12:00 PM onwards at Heuser Park, King of Prussia