Following with the Google uncle help 
The Panjal Mastan National Park is located in the Bagh District of Azad-Kashmir. Panjal Mastan National Park is at an average elevation of 2800 metres (9186 feet) above the sea level.
Apparently, this place is reachable by bikes (see below image)
Driving directions from Islamabad to Panjal Mastan National Park Rd
https://www.distancesfrom.com/directions-from-Islamabad-to-Panjal-Mastan-National-Park-Rd/DirectionHistory/28534288.aspx
@asifcae bhai, I believe you have already covered these areas in your trips to Ganga Choti / Pir Panjal.
Cheers 