At over 20 miles long, and in places over 4 miles wide, Loch Lomond is the largest fresh water loch in Scotland.
It is a popular recreational destination for tourists and local Scots alike. It offers all sorts of water sports such as sailing, kayaking, water skiing, windsurfing etc
It is also a well known destination for anglers both for coarse fish such as pike and perch, and migratory game fish i.e sea trout and salmon.
It is even possible these days to take a flight in a float plane.
It is also a popular destination for walkers and climbers. Part of the West Highland Way runs along the eastern shore.
If you want to try climbing a fairly modest hill, then then try Conic Hill, starting from Balmaha. Quite steep but not too high, it does afford you great views over the loch.
Over on the other side of the loch, at Luss, you could try climbing Beinn Dubh - a bit more of a challenge, but fantastic views.
But if you fancy bagging a Munro, then Ben Lomond is one of the more straightforward munroes - note I don't say easy, because whichever way you look at it, to climb a Munro, you have drag yourself over 3000 ft up a hill.
For more information on Loch Lomond visit this site: https://www.lochlomond-trossachs.org/