It is the second largest lake in Kyrgyzstan (18x29km wide, 13 meters deep) after Issyk kul, Song Kul lies at 3016 m (9895 ft) above sea level. It is surrounded by a broad summer pasture and then mountains. The area is inhabited and safely accessible only from June to September.
Reaching Song Kol is easily arranged but requires some effort. You need to access on horse, on foot or through a few bumpy hour's car-ride from Kochkor or Naryn. The road from the A365 up to the lake is paved about half of the way. Without a 4x4s this route is challenging but possible. CBT and other agencies, of which there are several alternatives in Kochkor, can arrange return transport for $80-$100 per car. The various agencies in Kochkor also arrange for tracking or horses (with guide) for trips of various lengths to and from Song Kul including yurt-stays on the shore of the lake. Such tours start and end in Kochkor, but can be combined to include hiking up and taking a car down from the lake.
Sampling the agencies on the spot in Kochkor is easy enough, but trips to Song Kul is also available from the CBT office in Bishkek, though at a higher price. Some companies like Iron Horse Nomads can bundle the transportation from Bishkek with CBT housing and an English speaking driver who stays with you with prices starting around $350.
If you have horses, riding the shores of the lake (while approaching the yurt-camp, or on an excursion to circle the lake) is a good alternative to walking. By the lake there are no roads even though cars can be driven on the plain between the yurts of the summer-time encampments by the lake.
Climb the mountain behind the yurts for a great view over the lake. It takes several hours to get to the top.
One of the yurts of the main yurt-camp has a primitive shop in summer. Chocolate, beer and vodka is for sale. Arranged trips to the lake usually include food at your yurt-stays.
There are no facilities on the lake, but local herders will provide supplies and rent yurts for about $14 per night including meals. They also collaborate with the various agencies, including the CBT, through which you can arrange them in advance, but it is also possible to just show up.