When is Windsor Great Park Illuminated? 30 July 2026 14:09 Updated Windsor Great Park Illuminated will be open from 13th November 2026 - 3rd January 2027. Related articles How long does it take to complete the trail? What are the opening hours? What is Windsor Great Park Illuminated? If I have booked an entry slot how long can I stay for? Are there toilets at the trail?