Founders' Days — Algonquin
Updated 2026-10 · Crystal Lake Insights
About This Event
Algonquin's largest annual festival with live entertainment, craft vendors, carnival rides, a 5K run, and fireworks.
When & Where
- 🗓️ Schedule: Last weekend of July (annually)
- 📍 Location: Towne Park, Algonquin · Algonquin, IL
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