The sun is still behind the mountain range which creates the following challenges.
1. The sky is very bright, since the clouds are backlit by the sun.
2. The forest and the lake in the foreground is still very dark, since not much light still falls on it.
A single exposure with today camera will produce either correctly exposed sky and completely black foreground, or properly exposed foreground with completely white sky. The current solution to this challenge is HDR technique. Take multiple various exposure and blend them together. Add contrast and dark areas as needed to make sure image isn't flat.