One of the favorite places to run in Macau. This 2.6 km loop of Sai Van Lake is along a pleasant path, with great views of the water and Macau Tower (which you’ll pass under). Locals say it’s a particular treat to do this run at sunrise. You might have to do a couple of laps to get in a more significant distance.
It’s possible to run a bit further north from the lake path along the Av. Panoramica, along a wide waterside path for ~0.5 km to just past the Maritime Museum and the A-Ma Temple.