Mt. Hood glowing in the background along the pine trees of the cascade as seen from Sherrard Point on Larch Mountain.
The light trails are stars. As the Earth rotates on its axis, the stars appear to move in circular motion, which is why for many centuries we -- humans -- believed that we are at the center of the universe. Only one star appears to be "stationary" in the sky, and that is Polaris, the northern star. You can always refer to Polaris on a clear night to find true north.
The color of the stars can reveal a lot about their nature. Blue color stars are often brighter and burn faster than white stars, yellow stars, orange stars and red stars, with red being the coolest of all respectively. Because they burn brighter and faster than red stars, blue stars typically only burn for a few million years before they self-destruct in a supernova explosion. Red stars can burn for billions of years. Our sun, is an intermediate level yellow-white star. The orange haze glow seen to the left of the horizon is our sun steadily rising.
Exposure at 50mins, f/2.8, ISO100. NEX5N -- MF 16mm with wide angle converter, Light enhancement in Lightroom 5, but no photo-manipulation otherwise.