St Michael’s Mount is a tidal island, connected to the mainland by an ancient, cobbled causeway.

At high tide, the sea covers the causeway and the Mount is inaccessible on foot; at low tide, the causeway is revealed and pre-booked visitors can stroll across to explore the island.

The causeway is open for around four hours each day, depending on the tides and weather conditions. Our ticketing system is aligned to the causeway times, so you’ll only be able to book ‘walking’ tickets when the causeway is uncovered.

Your ticket will clearly show whether you can cross by foot or by boat. It is important that you adhere to the time and means of crossing advised. You could be turned away from the island if you arrive too early or late.

We suggest that you allow around 15 minutes to walk across the causeway to our first checkpoint, which is at the base of the island.

We don’t restrict the time that you can stay on the island, but allow at least 4 hours if you have booked to see both the Castle and the Garden. When you want to leave and depending on the tide, you will either walk across the causeway to the mainland or catch one of our boats. Return boat tickets can be purchased from any of the island’s retail and food outlets and our staff will always be on hand to help.

Date Causeway Opens Causeway Closes
Saturday 31 July 2021 closed closed X
Sunday 01 August 2021 17:10 18:00
Monday 02 August 2021 18:40 18:00
Tuesday 03 August 2021 boat day boat only X
Wednesday 04 August 2021 7:40 9:30
Dateclosed Saturday
Causeway Opens closed
Causeway Closes X
Date Sunday
Causeway Opens 17:10
Causeway Closes 18:00
Date Monday
Causeway Opens 18:40
Causeway Closes 18:00
Dateboat day Tuesday
Causeway Opens boat only
Causeway Closes X
Date Wednesday
Causeway Opens 7:40
Causeway Closes 9:30