Loch Long is a sea loch located in Argyll and Bute, Scotland. It stretches approximately 12 miles (19 kilometers) from the village of Helensburgh to the Firth of Clyde. The loch is known for its stunning scenery, surrounded by hills and forests, making it a popular destination for outdoor activities such as hiking and sailing. The loch is also home to various wildlife, including birds and marine life. Its waters are part of the Clyde Sea area, which is significant for both ecological and recreational purposes. The nearby Loch Lomond and The Trossachs National Park enhances the natural beauty of the region.