The Central Idaho Dark Sky Reserve (CIDSR) is magnificent in every season, and at every hour of the day, so you don’t have to wait for the stars to come out in order to experience it. Nestled in the spectacular Rocky Mountains of central Idaho, the CIDSR offers an expansive network of hiking, biking and skiing trails, an unrivaled arts and culture scene and some of the best and most surprising dining and shopping options you’ll find anywhere. There are three cities within the reserve: Stanley, Ketchum, and Sun Valley. Each of these cities offers an authentic small town, big life experience.