St Michaels Mount

The Island That France Controlled for 300 Years

St Michael’s Mount sits less than 400 metres off the coast of Marazion in Cornwall, and for much of the medieval period it was effectively a French institution. Edward the Confessor granted the site to the Benedictine abbey of Mont-Saint-Michel in Normandy, and construction of a priory church began in 1135. The Cornish prior owed absolute obedience to the Norman abbot and sent him 16 marks annually. That arrangement lasted until Henry V’s wars in France made holding French religious properties politically untenable; the priory was dissolved in the early 15th century and the island’s ecclesiastical connection to Normandy came to an end.

The visual parallel between St Michael’s Mount and its Norman counterpart (Mont-Saint-Michel on the French coast) is not coincidental. Both are granite islands topped with medieval church buildings, both connected to the mainland by a causeway that floods at high tide, and both administered by the same monastic order for several hundred years. Most visitors to the Cornish version are aware of the resemblance without knowing that the administrative link was real.

Getting to the Island

The causeway between Marazion and the Mount is made of granite setts and passable for roughly four hours around low tide each day. The walk takes about 15 minutes each way. Tide times change daily and the causeway opening window shifts accordingly; check the official site or a local tide table the day before you visit, not the week before.

When the causeway is underwater (roughly half the day), a ferry runs from Marazion beach to the harbour at the island’s base. The fare is £2 one way for adults, £1 for children. The ferry operates from mid-March to the end of October.

Tickets and Opening Hours

Castle and garden entry requires a ticket. Advance prices start from £18 for adults in 2026, with National Trust members entering free but still required to book a timed slot in advance. The castle and village are open Sunday to Friday from 9:45 am, with last island entry at 3:45 pm and closing at 5:00 pm. The site is closed on Saturdays. The garden closes earlier in September. The garden is open Monday to Friday only.

Timed entry is enforced. Booking well in advance is advisable for summer visits (July and August in particular), as slots fill early. The booking system is managed through the official stmichaelsmount.co.uk site.

The Castle and Its Residents

The St Aubyn family purchased St Michael’s Mount in 1659 and have lived there ever since, occupying the upper sections of the castle under a 999-year lease that was established when the 3rd Baron St Levan gifted the property to the National Trust in 1954. The castle is therefore simultaneously a National Trust site and a private family home, which is an unusual arrangement that becomes apparent when you notice which rooms are roped off.

The oldest sections date to the 12th century priory. Later additions reflect the tastes of the St Aubyns over several generations: the Blue Drawing Rooms in the upper castle are Gothic Revival from the 18th century and designed with theatrical intent, though from the outside the overall impression is more fortified medieval than domestic.

The Gardens

The terraced gardens on the south and east sides of the rock grow plants that could not survive further inland in Britain. The combination of the granite slope, shelter from prevailing winds, and the moderating effect of the sea allows subtropical and Mediterranean species to establish here that would fail at comparable latitudes elsewhere. The garden is a serious horticultural site, not merely a pleasant backdrop, and is worth visiting separately from the castle if plants interest you. Garden visits are included in the standard castle ticket.

The Village and Harbour

A small community of around 30 permanent residents lives on the island, occupying cottages in the village around the harbour. There are a handful of shops and a cafe at the base. The Harbour Loft restaurant offers afternoon tea and light meals with direct views across to the mainland; the menu draws on Cornish produce, with local mackerel and clotted cream scones among the regulars. Lunch services run during opening hours; booking ahead is sensible in high season.

Where to Stay

Nobody stays overnight on the island except residents; there is no visitor accommodation on the Mount itself. The town of Marazion, a few minutes’ walk from the causeway, is the obvious base. The Marazion Hotel is 100 metres from the beach with views directly across to the Mount, has 11 rooms, and serves dinner daily from local produce. It sits in the mid-range price band (around £100 to £160 per night). The Godolphin Arms, closer to the causeway, has a more casual atmosphere with a pub-style ground floor and rooms above.

Penzance is 5 kilometres west and offers a wider range of accommodation from budget to boutique. The drive takes under 10 minutes. Penzance also has the nearest railway station: it is the western terminus of the main line from London Paddington, with journey times of around 5 hours on the fastest trains.

Getting There

From London, the fastest option is the train to Penzance followed by a bus or taxi to Marazion (approximately 10 minutes). From Penzance bus station, the 2/2A bus runs to Marazion regularly and takes about 15 minutes. Driving from Exeter takes roughly two hours via the A30. The A30 delivers you directly into Penzance and Marazion is signposted from the western approach.

Practical Notes

The island is not accessible by wheelchair above the lower harbour area; the paths to the castle are steep, uneven, and partly rocky. The National Trust website outlines accessibility in detail for those planning accordingly.

The best photographs of the exterior are taken from the Marazion beach at low tide, either in morning light or in the last hour before sunset. The island faces roughly south, so the castle receives good light for most of the day from the mainland side. If you are crossing the causeway, low tide at midday on a clear summer day produces the reflections in the wet sand that appear on most of the promotional material.

Check the tide times before assuming the causeway will be passable when you want it. More than one visitor per season gets caught on the wrong side.