This is the 2nd time I've seen what appears to be the same object. The first time it was traveling due south, this time due west. I spotted it just before it passed behind the mountain. The best way to describe the shape is to think of a Twinkie, but a bit narrower at the top, and the bottom is convex (rounded) instead of flat. It's white, with well defined edges. It doesn't look irregular, but appears to be engineered. I was standing at 7900' elevation looking south towards a nearby mountain (11,000+ ft) that forms part of the canyon I was in. The object caught my eye three or four seconds before it passed behind this mountain. It appeared to be moving fast. From where I stood, the summit of the mountain is not visible (I'm too close), so it's difficult to say if the object passed behind the mountain or over it.It moves in a straight line and doesn't appear to climb or descend. I almost didn't report this second incident (after reporting the first) because both events were rather unremarkable. Same mountain, but coming from different sides of it.