Bright white light/ resembling headlights extinguishing in secondsBetween 11:30 and 11:45 I went outside to have a cigarette. I was in the Beartooth mountain range 30 miles outside of Cody, Wy, and noticed a bright white light to the west of me. The light first looked like a airline headlight, which was very bright given the height of the perceived object. The light made its way to the east and lasted approximetly 10 seconds before it disappeared. I stood outside for 5 more minutes to see if I could glimpse the craft which I thought could have possible been hidden due to the sparse clouds. I did not see the light again.21 year old girl. Outdoor enthusiast, studying natural resource biology.