On the weekend we went up Guanella Pass, southwest of Denver, and hiked the South Fork Trail to Square Top Lakes. The hike is entirely above tree line, starting at 11,500' or so and ending up at 12,150' elevation. At that altitude, it's quite a hike. The first photo is a small waterfall on the road up to the summit. The second is at the trail head looking out over the countryside. The third is one of two Square Top Lakes; these are alpine lakes fed, I think, by glacial run-off. Not too sure about that, though. You do feel like you're at the top of the world.
Before summer's over, end of August timeframe, we're going to try to do more hikes, so perhaps more pictures will follow.