Me and 5 of my friends went on a 10 day trip to Cajamarca, on the first weeks of August, approximately 1000 kilometers north from Lima. We stayed at Granja Porcon. It is a community of farmers that have a reforestation program on a lot of terrain over there, they have reforested a lot already, mostly with pine trees, they cultivate their own food and make cheese, milk, yogurt and a lot of other products. They are self sufficient. Also, they have built some downhill tracks, they are really good and fun, and there is a lot of terrain to still work on!
Here's the video from our trip.