Milarrochy Bay is a bay on Loch Lomond, in southern Scotland. It is near the village of Balmaha. Known locally as Bakey Bay, due to the rounded mounds regularly on display.

There are a few houses near the bay. Other bays on the east of Loch Lomond include Cashel Bay and Sallochy Bay. The bay has a visitor centre, where you can pick up leaflets about Loch Lomond and The Trossachs National Park and the surrounding area. There is also a camping and caravanning club site.

The bay is popular with hikers on the West Highland Way, and photographers, who come to capture the famous Milarrochy Bay "lone tree"

56°5′59″N 4°33′38″W / 56.09972°N 4.56056°W / 56.09972; -4.56056