Loch of the Lowes is a freshwater loch located near Dunkeld in Perth and Kinross, Scotland. It forms part of the Lunan Lochs chain, situated just north of the Highland Boundary Fault alongside Loch Craiglush and Loch Butterstone. The body of water is characterized as mesotrophic, meaning it has relatively low nutrient levels due to its catchment area consisting mostly of acidic uplands. This geographical positioning distinguishes it from the richer, more nutrient-dense lochs found south of the fault line.

The reserve land was purchased by the Scottish Wildlife Trust in 1969 because the loch is the largest mesotrophic loch in the area and hosts the rare slender naiad pondweed. Historically, a drainage channel dug in the nineteenth century connected Loch of Craiglush with Lowes, equalizing their water levels and allowing the Lunan Burn to flow through. The site holds significant conservation status, designated as both a Site of Special Scientific Interest and part of a Special Area of Conservation.

The landscape is defined by its diverse wildlife habitats, including surrounding woodlands and the loch itself. Key features include an observation hide situated within 200 metres of a breeding osprey nest, allowing close viewing via binoculars and CCTV. The area supports numerous species such as red squirrels, otters, beavers, and various fish like pike and perch. The visitor centre on the western side offers three additional hides overlooking the water, serving as a focal point for wildlife observation.

The primary appeal for visitors is the opportunity to observe rare and abundant wildlife in a protected environment. During winter, migrant greylag geese and pink-footed geese roost on the loch, while summer brings swallows and swifts. A pair of breeding ospreys can be viewed between late March and August. The site also attracts birdwatchers interested in goldeneyes, great crested grebes, and woodland species like jays and woodpeckers, with viewing facilitated by an HD camera at the visitor centre.

Access is provided via a small unclassified road off the A923, leading to a car park for approximately 24 vehicles. The loch sits about two miles north-east of Dunkeld, with a woodland footpath connecting the centre to the town, suitable for walkers and mountain bikers but not wheelchair users. The visitor centre operates on a reduced winter schedule from November to February, requiring an entry fee for non-members, while remaining open daily during the warmer months.