Mount Gambier's Blue Lake is one of the most stunning features of SA's South East. It is worth a drive from Adelaide to see this natural wonder, and the surrounding Mount Gambier landscape formed by the, now inactive, volcano. The best time of the year to visit is from November till April, where the lake will be the stunning cobalt blue colour that it is famous for.
Just why the lake is so blue, and why it changes colour during the winter months, still isn't exactly known. It is generally thought that it is due to the limestone within which the lake it set. When you're there to see the lake you'll be more mesmerised with the colour rather than why it is that way.
Unfortunately there is no swimming in the lake. The Blue Lake is Mount Gambier's main water source, so you'll have to do all your viewing from above. This isn't to say that your only option is seeing the lake from one of the viewing platforms. There are tours run through the Blue Lake Aquifer, and these will give you a bit more insight into the lake. Tours are conducted hourly, and they'll cost $8 for adults, $4 for kids, and $23 for families. You'll learn about the lake, what it means to Mount Gambier, and its history to both European settlement and Aboriginal culture.
Another great way to see the lake is to walk around it. The 3.7km track is pretty easy to do, and is a relaxing walk. You'll have the bright Blue Lake as your guide, as you follow its circumference. Head out early in the morning and you'll be joined by all the locals getting their morning fitness hit.
If you do just want to take a look at the lake, without the walk, then you'll also find this easy to do. There are multiple viewing platforms around the lake, and you'll usually find a carpark nearby. You'll get a great view of the lake, and there will be plenty of photo opportunities. Just be warned that at times it can get pretty windy.
So give the Blue Lake a visit, and take part in one of the tours to learn more interesting facts about this natural wonder. The Aquifer is open 7 days a week, and you can head to one of the Blue Lake viewing platforms at any time. If you're not driving then the Blue Lake is also just a short walk from the city centre.