"The Pentland Hills Regional Park is a great place to enjoy on wheels! Over the past few years, mountain biking has become a popular activity in the Pentland Hills Regional Park, with many routes available for responsible riders to enjoy.
Whether you are out with your family or looking for a more gruelling challenge there are routes for all levels of fitness and ability as most of the 100km of paths in the Pentlands are suitable for cycling."
Of the many possible routes in the Pentlands, I would recommend the route suggested by the website addressed above. There are a variety of points where you can start on this circuit depending on what side of the hills you are coming from, see map on website for details. This route is mainly singletrack with a few connecting lanes, that show off the stunning scenery that the hills and reservoirs have to offer as well as views of the capital.