Roar into a night with a dinosaur sleepover adventure at Colchester Castle

This latest Knightzzz event introduces an exciting new dinosaur theme, inspired by Juliasaurus and the new Discover exhibition at Hollytrees Museum

Promotional night‑time poster for ‘Knightzzz at the Museum: Roar and Snore’, showing two children with backpacks exploring a museum at night as a dinosaur appears in the background, with event date 29 May 2026 and pricing information.


Ever wondered what Colchester Castle is like after dark? Find out at Colchester Museums’ Knightzzz – Roar and Snore on Friday 29 May – a roar-some overnight adventure inside one of the city’s most iconic historic buildings.

This latest Knightzzz event introduces an exciting new dinosaur theme! Inspired by Juliasaurus and the new Discover exhibition at Hollytrees Museum, Knightzzz Roar and Snore is perfectly timed for young dinosaur fans and curious grownups alike.

Event details

The event starts at 7pm, once the Castle has closed its doors for the evening. Friendly rangers will lead handson dinosaur activities, bringing prehistoric stories to life, while over at Hollytrees Museums guests will come facetoface with the very real and mighty Juliasaurus – a 150millionyearold dinosaur making its world premiere in Colchester. 

There’s something truly magical about experiencing a museum after hours. After an evening of prehistoric discovery and pitching camp inside the Castle, families can slow the pace with a cosy hot chocolate before settling down for the night, surrounded by centuries of history.

The adventure continues into the morning with a light breakfast, leaving families with memories to last a lifetime. It’s a shared experience that’s fun, immersive and unforgettable – ideal for young explorers and the adults who love discovering alongside them.

Ticket information

With limited places available, Knightzzz Roar and Snore is expected to be popular. Tickets must be booked in advance, and families are encouraged to secure their place early via the Colchester Museums website.

Find out more and book your tickets online.

Pamela Donnelly, Colchester City Council’s Chief Executive, said: “This brandnew dinosaur sleepover is packed with discovery, drama and family fun. ‘Knightzzz – Roar and Snore’ offers a truly unique way to experience Colchester Castle after hours and to come facetoface with Juliasaurus – a real 150millionyearold dinosaur making its world premiere in Colchester. 

“Our sleepover events are always a big hit and with Juliasaurs also being hugely popular, we expect tickets to sell fast so are urging families to book as soon as possible to avoid missing out.”

For those looking for a unique family experience with a prehistoric twist, this overnight Castle adventure promises to be truly dinomite!