Thanks for the recommendation, I’ll give it a try. I’ve been mostly running up and down Quarry Bay Park, but it does get boring after a while and the proximity to the highway probably isn’t too healthy either. I also love cycling but in Hong Kong it seems too freaking dangerous for all sorts of reasons.

You can do some cycling in Tai Po area, but down there, it's not the drivers that make it dangerous, but other cyclists. They cycle like they walk, so be prepared to be constantly cut off and have people stand in the middle of the road.

If you're close to Quarry Bay, you might want to look into Tai Tam, it's a nice nature park, there's several paths that you can take.