When deer cross from one valley, to the next, they usually take the easiest route. Look for saddles (low spots in the ridges) and you' ll see where deer cross from. When traveling the ridges themselves, they usually like to walk the " shelves" on the sides of the ridges. I believe that deer will stay high during the morning, and may travel lower shelves during the evening. Reason for this is the thermals rise in the am, and go downhill during the evening. This way they can use their noses as their primary detection system.