Do you mean the "Countryside" series maps?
Hong Kong Island & Neighbouring IslandsClick image to see full-size versionThose are the best available hiking maps.
But if you want survey maps, they also have 1:1000 maps that are extremely detailed as well.
You can buy them on paper, but they are also online at
GeoInfo Mapand also
Centamap and you can just print out screens from your PC.
I don't have a smartphone, but most have GPS and can give you a live map display.
However, if you go off the main trails you find that many of the footpaths marked on maps are overgrown and conversely, there are other unmapped trails.
Often a promising trail goes off into the hills and then deadends at a gravesite. Around Tai Peng/Pak Kok there is a network of trails used by mountain bikers, that just go around in loops and bring you back to near where you started. But are pleasant walks nonetheless.
Get to the wind turbine and then there is a track starting beside the lookout shelter that takes you to the youth hostel, where you can loop back or continue to the real wilderness of South Lamma if you have a few hours.
It's a pleasant time to be walking now, in a few months it will be hot, sticky and muddy.