Roath Park, located due north of Cardiff Center, is one of the most popular recreation areas in the city. It’s sort of a narrow linear park, starting near Waterloo Gardens and working its way northwest for 2 miles northwest through the Roath Recreation Ground, Gardens, and then the Park with paths along the lake. Runners will enjoy miles of gravel paths along the Roath Brook, manicured gardens, and even a picturesque lighthouse rising above Roath Brook.
There are numerous opportunities for out and backs or loops along the many paths here, but a full circuit of all the park offerings can reach up to ~8 km. Note that the neighborhoods surrounding the park are considered some of the finest in Cardiff, so don’t be afraid to venture out onto nearby sidewalks to extend your route. See our post on the Best Cardiff Neighborhoods for Running for more info.
Add-On: Heath Park, just west of Roath Park, is a classic English heath for running.