5k Run Penarth: Scenic Loop at Cosmeston Lakes Country Park

Route Overview & Local Insights

Experience the natural beauty of South Wales on this 5.1km trail loop at Cosmeston Lakes Country Park. This undulating course follows the much-loved local parkrun route, leading you through a mix of wooded glades and open lakeside segments. Expect well-maintained gravel paths that offer a bit of "crunch" underfoot, making it an ideal choice for runners looking to transition from pavement to trail. With a manageable 32m of ascent, the terrain provides just enough variety to keep your heart rate up without being overly technical, eventually splitting north for a scenic loop before returning to the start via the main path.

Located near the coastal town of Penarth, Cosmeston Lakes is more than just a park—it's a window into the past. The site was once a limestone quarry for the Blue Lias cement industry, which explains the dramatic dips and rises in the landscape. Today, it is a designated Site of Special Scientific Interest (SSSI), home to a reconstructed Medieval Village that stands right by the water. As you complete your loops around the Western Lake, look out for the diverse birdlife—the park is a haven for mute swans and great crested grebes—providing a tranquil backdrop for your morning miles or weekend tempo work.