Practical information from the area: Hunza valley
This part of Pakistan is regarded for the one of the safest in the whole country.
Practical information from the country Pakistan:
Pakistan is generally very restless country with frequent terrorist attacks, especially by the mosques, at marketplaces or on buses full of shiia wanderers. Always determine in advance the current situation, where you are going.
Generally dangerous is the whole area near the border with Afghanistan, particularly Waziristan (Taliban troops)
Another dangerous area is relatively large and deserted Baluchistan (criminal acts, kidnappings)
Trekking in the Nanga Parbat is ideal with a guide, although it is not mandatory. There are sometimes "strange people" in this area.
The worst incident happened here on June 23, 2013, when there was massacred a group of foreign climbers
But the trekking north (Karakoram mountains) has a reputation of a safe and quiet area.
From the natural perspective are dangerous summer monsoon floods, often catastrophic and landslides after heavy rains