Hill forts · North West England
Milefortlet 23
In or near Crosby.
Milefortlet 23 — milefortlet of the Roman Cumbrian Coast defences.

Wikimedia Commons licence
Plan your visit
- Typical visit
- 1 h–2 h
- Nearest railway station
- Maryport · 1.9 km
- Free entry
- Dog-friendly
Getting there & planning your visit
To visit Milefortlet 23, the nearest railway station is Maryport, located 1.9 km away. Entry is free, and the postcode for sat-nav is CA15 6PA.
About
Milefortlet 23 is a hill fort in the United Kingdom. Heritage designation: scheduled monument. Part of Hadrian's Wall. Wikidata describes it as: "milefortlet of the Roman Cumbrian Coast defences". Coordinates: 54.7279°, -3.4851°.
Photo gallery
See it from the streetimagery from 2022
Imagery © Mapillary contributors, CC BY-SA 4.0
Protected designations
- Area of Outstanding Natural Beauty: Solway Coast
Designations sourced from Natural England open data under OGL v3.
From the Wikipedia article
Milefortlet 23 (Sea Brows) was a Milefortlet of the Roman Cumbrian Coast defences. These milefortlets and intervening stone watchtowers extended from the western end of Hadrian's Wall, along the Cumbrian coast and were linked by a wooden palisade. They were contemporary with defensive structures on Hadrian's Wall. There is nothing to see on the ground, but Milefortlet 23 has been located and surveyed.
Excerpt from Wikipedia under CC BY-SA 4.0. See the source article linked in Sources below.
Background
Description
Milefortlet 23 is north of the town of Maryport in the same parish. It is on a south-east facing slope at the edge of a steep cliff. The fortlet is about 1 kilometer northeast of the Roman fort of Alauna. Nothing can be seen on the ground but the fortlet is visible on aerial photographs as faint cropmarks. A geophysical survey was carried out in 1994 which showed three sides of a surrounding ditch, the fourth, west side, having been destroyed by cliff erosion. Further features within the milefortlet were detected in another geophysical survey when the area of the Roman Fort (Alauna) and vicus, incorporating the area of Milefortlet 23, was surveyed between 2000 and 2004.
Sourced from Wikipedia under CC BY-SA 4.0.
- Coordinates
- 54.7279, -3.4851
- District
- Cumberland
- Parish
- Maryport
- Postcode
- CA15 6PA
- Parliamentary constituency
- Penrith and Solway
- Nearest railway station
- Maryport — 1.9 km
Sources
- wikidata: Q16247500 (CC0)
- wikipedia: Milefortlet 23 (CC BY-SA 4.0)
Other places nearby

Roman temple in Maryport
Follies · 0.7 km

Alavna Roman Fort
Mountains & hills · 0.7 km

Alauna
Hill forts · 0.7 km

Alavna Hill
Mountains & hills · 0.7 km

Alonby Bay
Natural landmarks · 1.0 km

Senhouse Roman Museum
Museums · 1.2 km

Netherhall
Literary houses · 1.4 km

Fleming Square
Museums · 1.5 km

Milefortlet 22
Hill forts · 1.5 km

Empire Palace, Maryport
Theatres · 1.7 km

Maryport
Castles · 1.7 km

Maryport harbour
Marinas · 1.8 km
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Frequently asked questions
- Where is Milefortlet 23?
- Milefortlet 23 is in the Scottish Lowlands, United Kingdom (postcode CA15 6PA), in the parish of Maryport.
- What is Milefortlet 23?
- Milefortlet 23 — milefortlet of the Roman Cumbrian Coast defences.
- How do I get to Milefortlet 23?
- The nearest railway station is Maryport, about 1.9 km away. Drivers can use postcode CA15 6PA.
- Is Milefortlet 23 a listed building?
- Milefortlet 23 is officially recognised as scheduled monument listed.
- Is Milefortlet 23 a protected site?
- Yes — Milefortlet 23 is part of the Solway Coast National Landscape (AONB).
- Is Milefortlet 23 free to visit?
- Yes, Milefortlet 23 is free to enter.
- How do I get to Milefortlet 23?
- The nearest railway station is Maryport, about 1.9 km away. Drivers can navigate to postcode CA15 6PA.