Trek to Kol Tor lake becomes extremely popular.  Just 80 km from Bishkek city. The lake has very unique blue color and surrounded by high peaks. Very impressive and scenic place.  
The trek itself also lies through the forest and hills rich with flora and fauna. You may feel yourself miscellaneous surrounded by such gigantic pine trees, rocks and deep gorges. 
 This hike is a medium-level difficulty. Takes 3-4 hours one way and requires some physical training.  It starts at 1900m above sea level. The lake itself sits above 2700m above sea level.   Climate conditions are not predictable and may change hour after hour. 
Before we start a trek we will do a quick visit to the famous UNESCO site –  Burana Tower.