Caernarfon Bay (Caernarvon Bay) (5305'N., 435'W.) is entered between Bardsey Island and Holy Island, 32 miles N. The SE part of the bay is formed by the NW coast of the Lleyn Peninsula which is bold, rocky, mainly steep to, and rises to mountainous country inland. Snowdon, the tallest peak, stands 10 miles inland. Its summit is 1,083m high and is sometimes covered by clouds. The NE part of the bay is formed by the SW coast of the island of Anglesey. The shore of this island is indented by many small bays and fronted by ledges and rocks which extend up to 1.5 miles offshore. The island of Anglesey is separated from the mainland by the Menai Strait, a narrow and navigable waterway. Holy Island lies close off the W coast of Anglesey and forms the S side of Holyhead Harbor.

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