- Shelter
- N, NE, W, NW
- Seabed
- sand
- Anchoring
- Allowed
Anchorage off Castle Rock on Lake Huron, north of St Ignace near the Straits of Mackinac, sand bottom, protection from N, NE, W and NW.
Guide
Approach and anchoring
Lies open to the southerly sector, so it suits settled weather only. St Ignace marina is about 3 miles to the south and Mackinac Island State Harbor about 6 miles to the south-east for shelter and supplies.
Ashore
Castle Rock is a limestone sea stack rising 195 feet above the shore, left standing when post-glacial Lake Algonquin receded. It opened to visitors in 1929, and a stairway climbs to a viewpoint over the straits and Mackinac Island.
Key facts
- Type
- Anchorage
- Coordinates
- 45.91205, -84.72823 (45°54.72'N 84°43.69'W)
- Country
- United States
- Shelter
- Sheltered from north, north-east, west, north-west winds
- Seabed
- sand
- Anchoring
- Allowed
- Boaters' rating
- 4.8/5
- Updated
- July 7, 2026
Getting there
Castle Rock lies at 45°54.72'N 84°43.69'W, that is 45.91205, -84.72823 in decimal degrees.
Boaters' reviews
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Write a reviewFrequently asked questions
Which winds is Castle Rock sheltered from?
Castle Rock is sheltered from north, north-east, west, north-west winds.
Can you anchor at Castle Rock?
Yes, anchoring is allowed at Castle Rock.
How do boaters rate Castle Rock?
Castle Rock is rated 4.8/5 by boaters on BoatMap.
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