The view from Sky Gate at Ham Rong Mountain is not to be missed. There are many trails when you entered the mountain park, but only one trail will lead you to the Sky Gate. From this observation deck, you can see the entire town of Sapa. Sapa is often overcast or covered in fog. However, if you are lucky you will get a glimpse of sunshine in the late afternoon.
Make sure you bring bug spray because mosquitos will be swarming all over you on the hike up.