Traeth Coch (Welsh for "red beach") is a wide sandy bay and an area of outstanding natural beauty on the east coast of the island of Anglesey in Wales. The bay is also known in English as Red Wharf Bay and lies between the villages of Pentraeth and Benllech. It is also close to Castell Mawr Rock, thought to be the site of an Iron Age fort.
Red Wharf Bay beach itself has an immense expanse of sand; at low tide almost 10 square miles (26 km2) of sand is uncovered. The sand and the sea life disappears beneath the waves twice a day and reappears just a few hours later.
The village of Red Wharf Bay is situated on the western shore of the bay. It is small but perfectly formed. The village is linked to Benllech and Pentraeth via the Anglesey Coastal Path. Red Wharf Bay offers convenient places to to eat or drink, with three restaurants—The Tavern on the Bay, The Ship Inn, and The Boathouse—all boasting stunning views of the bay.
The bay attracts an abundance or wildlife, including a large number of waterfowl and wading birds, such as oystercatchers, shelduck, purple sandpipers, curlew and dunlin. The bay is bordered by salt marshes and sand dunes. Some of these dunes are rich in shell fragments that support the flora common to lime-rich areas, including the pyramidal orchid.
Each year the Red Wharf Bay Sailing Club Anglesey Offshore Dinghy Race takes place from Beaumaris to Traeth Bychan. The 14-mile (23 km) race runs up the Menai Strait and down the Anglesey coast.
There was once a railway line which terminated at the bay, the Red Wharf Bay branch line, which left the Anglesey Central Railway at Pentre Berw. Also, the beach was the birthplace of the Land Rover.